Didn't they do that to themselves? IIRC, it's like that because (A), they were the first to do underground rail so lots of things were done "wrong" (with what w

Didn't they do that to themselves? IIRC, it's like that because (A), they were the first to do underground rail so lots of things were done "wrong" (with what we know today), thus requiring lots of money to fix it. And, (B), any changes they make (even small ones) require redoing significant infrastructure because of (A).