To each his own, but with all the railroad software out there I don't see the popularity growing into the future.
I have several train simulators. I get tired of them after a couple hours and put them away for months at a time.
If you like trains and simulators, one I would recommend is "Cities in Motion 2" available on STEAM for $19.99. You build bus, trolley, tram, metro, and ferry lines. Not a city builder like SimCity- but pretty cool.
If you provide bad service to comuters, they will make you pay, make you pay big time !