No modern metro system should have anything new with drivers, as of about 20 years ago. Now most systems were build when automation wasn't an option, and it does take years to upgrade, so I'll give them another 10 year to do all the needed upgrades to get rid of the now obsolete drivers. I'll be shocked if any make them that haven't already, but the upgrade and remodel cycle should be 30 years long for all transport systems so I have to give them those 10 years.