Strong disagree. Let’s break down your claim that rail will not be relevant on this corridor unless “we can get Pittsburgh-NYC under, idk, ~3 hours”
Obviously, the Philly - NYC stretch of the Pennsylvanian is a very high ridership corridor, with trips provided by the Northeast Regional, Acela, Keystone Service, Palmetto, Carolinian, Silver Meteor, Crescent, etc. I'm going to assume you aren't calling rail an irrelevant travel mode on that corridor.
Even the Harrisburg - Philadelphia corridor is a high ridership corridor with trips provided by the Keystone Service. I'm also assuming you aren't calling it an irrelevant travel mode on that corridor.
So, the stretch that doesn't have high ridership, the only stretch over which the Pennsylvanian is a major share of passenger rail ridership, is Pittsburgh - Harrisburg. That's the only section you could defensibly call rail "irrelevant.”
At present, the Pittsburgh - Harrisburg portion of the route takes 5.5 hours of the 9hr 15min Pittsburgh - NYC trip. Claiming that we need to shave 6+ hours off of this 5.5 hour trip is obviously impossible. So, you are either claiming either:
- that for passenger rail to matter, trains need to be able to travel backwards through time
- that rail is irrelevant between Harrisburg - Philly - NYC, despite the high ridership spread across multiple routes, using for whatever reason a route that only supplies a very small minority of the passenger rail trips over that corridor as evidence.
Bad take. That's obvious.