Compare to North America, whose population has more than quadrupled in the last ~100 years or so. Demand for passenger rail in North America started petering out in the 50s and 60s simply because people just weren't taking the train. It didn't make sense for the network to continue expanding once everyone had a car and flying became more affordable. Even if you save a few bucks taking the train, planes are just faster and more price competitive than you may assume. It also helps that for planes you don't need any actual ground infrastructure. It's way easier to just pave a giant slabs of asphalt in each city and fly there instead of laying down thousands of miles of dedicated passenger tracks between every single major population centre that need to be consistently maintained.
The demand for passenger rail was already on the decline by the 1930s, which also corresponds to passenger air travel. Many airports were built by the 1930s, and with innovations in planes they "took off" in the 1960s which replaced trains as the de facto long distance travel option.
But to go on to
@FPTMIU's post...
To me it just kinda feels like
>Man this store sure is lacking in apples
>BUT THE ORANGES ARE RIGHT THERE DUDE
It all comes down to what exactly you are asking for. The actual
method is wildly different, but it still fulfills the same
purpose of what is trying to be achieved. This is different than comparing highways to passenger rail because they still serve significantly different parts of the population.
I honestly just straight up disagree with this. Every time I've flown by plane you are stuck in a extremely tiny seat, cramped right next to a sweaty dude. You try to fall asleep to make the trip go faster but every single time turbulence wakes you up or some random yell by a passenger. Then a baby starts crying, then a kid starts going apeshit, then you hear a muslim family loudly arguing, the food comes in and it looks less appetizing than the slop fed to pigs at a farm. You eat the meat only to realize it is raw and icecold, you awkwardly let your plate sit. Then when it arrives you want to get out as soon as possible but you have to wait at a standstill for 50 minutes while the staff does God knows what, then you get on a cramped bus which is never properly airconditioned whenever you are going to a sunny country
I've had very very different experiences. Granted, this is subjective and luck of the draw, and in the last 10 years I've only gone on three flights, so flights tend to be memorable experiences, good or bad. I've figured that if you fly regularly like my brother does (and goes on international flights, so Europe included) that these are going to be anomalies. (I can ask my brother, if you like). Frankly, I've found a good book works well (laptops are too bulky). Never been on a long-haul flight that includes real food, but United often has stroopwafels available and soft drinks. This is all from a relatively inexpensive line like United's coach.
Also when it comes to the aforementioned buses, the shuttles I mentioned are definitely air-conditioned.
@quaawaa is right--those people will be on the trains if the EU kills shorter flights like parts of France did.
Also also it's
never anywhere close to 50 minutes to disembark unless there's something
seriously wrong. Yeah you'll still wait for the passengers in the front and it feels longer when the last time you peed was 800 miles away and you're regretting getting that fourth beer, but 50 minutes, come on dude.
Well, no. US actually used to have a pretty decent train network which was from what I recall mostly abandoned or turned into highways.
The train network still mostly exists, it just does freight, which was the real profit center for railroads even in the "golden age". The road network nowadays takes a lot of pressure off of the trains by having trucks carry a lot of the dry goods and smaller loads, but trains are still useful in bulk deliveries (and almost universally, raw product—the general rule for factories is "trains in, trucks out". They weren't replaced with highways in the same way you think of them being. In some of those cases, the old rail line was used for expanding or rerouting an existing highway...not in the Katy Freeway sense where they used the obsolete line as right of way, but examples like how US-290 west of Hempstead uses an abandoned rail line to expand the roadway, a result of Southern Pacific (pretty sure it was Southern Pacific) abandoning the line soon before. Some of the old line is on private property now.
The particular railroad here was the direct connection from Austin to Houston, but Southern Pacific found that for freight there were other connections that worked better (less twisty/hilly) and the potential for passenger was squeezed out between a decent highway between Austin and Houston (still not a freeway, especially with Austin's issues, but more parts have been upgraded over the years) and the airport connection between Houston and Austin.
The issue is that, as previously mentioned, no european is going from Amsterdam to Moscow on train (Then again in the current political climate, not by plane either

), when people talk about taking the train, they mean Lelystad to Rotterdam, Dresden to Berlin, Milan to Venice. Distances which aren't necessarily short, but also not particularly long. You're really looking at this in the completely wrong way. I mean, the common favorite country of train autists is Japan where you have basically 0 long distance trips made.
I kind of assumed that states in the US more or less resembled countries and you can generally live without leaving your state outside of vacations. Did I assume this wrong?
I mean it really depends, the cities in the Northeast are tightly integrated, there are metropolitan areas there (and smaller ones in the rest of the U.S.) that cross state lines, and of course logistics require free travel between states. That's not even counting the sheer size of some states (Texas, California and Florida lengthwise, most states widthwise). State lines can be in weird places, there's some that will cut through neighborhoods, some that are on opposite sides of the roads, or maybe even parking lots. On the major highways, there's usually a big sign and a nearby "welcome center", which is a fancier rest area that has an air-conditioned building with restrooms, tourist information, and vending machines. (This is different than a "travel center", which is a fancier name for a truck stop, or a "rest area", a mostly-dying relic that just has some parking and picnic tables).