Looks very realistic, however I have to question the whole premise of a train sim, trains seem to be the most boring vehicle to choose here, they run in tracks so not much freedom, basically accelerate and brake.
You're correct for train driving sims, but they hit a very particular niche of people who really like trains.
They're insanely popular in Japan.
Railroad Tycoon hints at a world outside of accelerate and brake.
Then you know nothing about trains and the track networks they run on, which is probably why you dont find them interesting. Thats fine, just realise there is much more to trains than accelerate and brake :)