Other simulators keep getting mentioned, so I felt it prudent to mention a few things....
Railworks actually has been far more effective at alienating content creators (Actually the most successful of all of them) because of their "Whats yours is ours" ToS agreement. To even load it in the game in the format it needs to be it can legally be called "Theirs". Further, you think N3V has been bad for playing Bait & Switch? You should see what RW did to alot of its freeware.... Railworks near as I can tell (Speculation here), is going for an Arcade Gaming Style standard in an effort to appeal to the gaming crowd.... Good luck to them, I don't think many Gamers are gonna get much enjoyment while listening to DubStep and Sinking Dew quicker then the Titanic while rolling along a fixed set of Tracks with no action then watching a few set of numbers move....
Run8 Makes all of their own exclusive payware. Awesome Operational sim, but having the option for content that most other sim's are bringing to the table (Though Railworks is quickly approaching a similar state), is well otw to costing about the same as a small N Scale Layout of no great quality.
MSTS/Open-Rails..... The Golden boy of Freeware content.... Except that being an Open Source project its "Improvements" Never end, and to the best of my knowledge they still haven't gotten Open Rails out of what they call their "Beta" stage some 3+ years on. What they can do with it is incredible. But I'm not a code programmer and have little interest in helping find or fix programming bugs and submitting tickets. Further, they still have the Least Operational Functionality of every other "realism" based simulator out to date (I say Realism to keep the comparison to the kiddie Apps out of this).
The JR Sim.... I wish them luck. I'm a Big Fan of JR. Maybe they can break the mold of the current Rail Simulator Genre, and if so, I might buy a copy for the right price (They do seem to be pretty good at finding that most of the time). That said, planning to rage quit one game for another that hasn't had a single piece of pre-release information put out about it seems a silly move to me if your goal is to play (or create for) a Rail Simulator...... But whatever.
I will also mention, as others have, that personal speculation on numbers of actual users of Trainz in any format (How many people use this copy, how many people are creating for that version), are highly inaccurate. Want to prove me wrong on that count? By all means, do so, please start by posting Screens of either Sales Data or DLS Upload Logs (Though I would even take an Excel of accurate data collection, though this would have to be reinforced with something like confirmable IP address' or N3V confirmation) .... But oh wait, N3V is the only one that has any of that.... Maybe we should take their word on monitoring their own products, I'm sure they have a vested interest in doing so..... Whatever other problems or mistakes they might have or have done.
I don't like discussing the other simulators here, but again, since they keep cropping up and it keeps going unaddressed, I figured I would make a stab at it. Some of my information may be out of date, and its certainly broad, but its the result of living through experiences with all of them (Except for the JR one of course since to date I don't believe any non-JR Creator or direct friends/family there of has seen anything about it)
Finally, this is posted in a means to move some conversation to a more meaningful discourse, and not just in defense of Trainz or any other single entity.... I think we've all seen enough threats and Hard Feelings repeated to understand that there are some very unhappy people for the same very specific Reasons.....
-Falcus