I can't use TS20xx anymore, if the next update doesn't improve performance or stability. There's horrible stuttering, and even crashing when my PC (Which is not slow) tries to render scenery. Sometimes train doors are stuck open, and you can't do anything. Last time when I tried to play TS20xx, I done actually nothing, because doors stuck open. I don't care how mad do you get at me. This is the fact, based on my own experiences by several months. All that I have tried has improved nothing, and when TS2020 updated to TS2021, things got just worse. Crashing become more usual, and nothing has been improved. Even using fastload does nothing. We need a real miracle to get things better.