Yes, but from and to where?
The Tesla factory, with its huge number of employees all trying to get to the same place all at once? The Gigafactory, where exactly the same thing is happening?
Yeah, some situations are more suited to passenger rail than others. Large manufacturing facilities with huge numbers of employees is one of them.
I used to live in NYC. To go anywhere took hours by subway,
Well, your alternative was to take several MORE hours to go by car, and then walk miles from the nearest parking space. That's not an alternative. (I've tried it. The subway's faster.)
and every time I came out of the subway, I smelled like the one other unpressured utility that also flowed underground and leaked into the subway system mostly in Chinatown but all over: sewer.
That has literally nothing to do with train service. The streets and sidewalks of New York smell too. The subways of London, Beijing, Moscow, Stockholm are clean. In LA, the subway's cleaner than the streets (telling you which one gets more funding for cleaning).
NYC is not a city I like. It has serious problems. Some are because all the severely mentally ill people were thrown out of the institutions onto the street by Ronald Reagan. Some are because street (and subway) cleaning was defunded and never reinstituted. Some can onely be described as due to bad attitude -- a tolerance for littering which you would never see in some other countries.
This has absolutely nothing to do with train service. Step out of your car to walk from the parking garage to the door of your destination building and you'll see the same problem.
The stations were annoyingly cold or hot, stinky, full of dangerous and ugly people, and soul-crushing.
That has literally nothing to do with train service, again.
Train stations can be "temples of commerce" or ratty shacks, just as roads can be smooth and well-maintained or potholed, trash-strewn messes (Detroit comes to mind for the latter).
As a reward, I lost a lot more ability of my knees by having to walk so far at both ends of the trip, and often between subways themselves, and often through dangerous polluted smelly ugly neighborhoods.
The fact that you don't like New York City (I dislike it quite a lot myself, and much prefer to visit Boston) has absolutely nothing to do with train service whatsoever.
The solution is to avoid density altogether, diminishing the density of existing high density areas until they are low density enough that roads work well.
OK, you're following a back-to-the-land, mandatory low-density, NO CITIES idea. This was actually tried in the US in 1950s as *government policy*, as a reaction to the fear that nuclear war could destroy a city with one bomb. It's been pretty much a disaster.
I won't argue with you about your preference for this, because it's a preference. Your preference is simply not shared by the majority of people. Lots of people like cities, and there are long essays on how suburban life ends up antisocial and wastes most of its time travelling in different directions. If you don't get this -- perhaps you will get it when you realize that in practice, your utopia has no nightclubs and no theaters and no block parties and no street festivals and no museums and no art galleries. Some people like those things. (Some people don't). It's impossible to sustain them without density; it's been tried.
What I will point out, however, is that Musk is not proposing what you're proposing. Musk is proposing car tunnels as a solution to *urban problems*. Your desire to eliminate cities has nothing to do with this. Musk's idea doesn't work in cities, and he is proposing it specifically for cities. He is not proposing what you are proposing.
No, that's not at all true: freeways are built before the overcrowded phase.
Historically inaccurate. Freeways are built after ordinary roads get overcrowded. This isn't even debatable; you can just look up the history of it.