It's less about the updating and more how it keeps going. They put off a lot of renovating though that there's so much old tech that things are crapping out all at once. And with ConEd doing work it apparently also shorted things out lately. But I would be dead in the water without it at all times.
I'm a train nerd/geek so if y'all have questions about them let me know
If you guys want to see some anomalies they're taking R143 half length trains from the L and using cameras and sensors between cars around sharp curves on the 8th avenue line and around Coney Island yard for the proposed new R211's design. The R32 fleet is to be retired at the end of 2017 supposedly too. Something incredibly impressive is that we keep these things in running condition that are into the 50s and near 60s. They are living history. The R32 outlasted the R40, which was younger than the R32.
For anyone that takes the crosstown the R68 and R68A trains on there are getting refurbishments and new PA/LED systems.
And of course, they're closing down one side of at least 53rd street on 4th avenue in Brooklyn to do renovations and plan to continue that progress with most stations. Also, the N/W service in Queens is going to be disrupted for some weekends. So plan accordingly for that.
I really should work for the MTA.
You can still see platforms from the old trolley systems in some J line stations... The old 42nd street platform was cut in half when they extended the 7 to Hudson Yards, and did you guys know the Broadway line is the deepest system below the ground on average?! The IRT (1-7) actually get more maintenance than the IND/BMT (letters) and the people working the IND/BMT actually have to manually run switches and such more. Debating on whether or not I should scare all of you away with more useful and useless MTA info.