I occasionally see the cost for rail-related projects and the dollar percentage of the projects used for ADA compliance are staggering. BIG chunks of money. As to the efficacy of the ADA that's not for this forum....
With that said, the original Penn Station as built surely had some interesting architecture. Moving the masses in style was the architects first and foremost goal.
And even now, the Penn Station clearances have nothing on the elevator used to access the Red Caboose on 45th St in NYC. I didn't know it was possible to make a phone booth into an elevator car.