The TT crowd just have to download the Fantasy grounds client and have Discord running, but there is no demographic beyond, I want to try a roll play group.
The Dungeon Master, has to have the full licensed version, which allows anyone to try it out at no cost. It ranges from teenagers, a lot of college students, military, to older veterans.
The moding community's dedication to the 5e rule set clearly shows that this community was far bigger than one would imagine. The system works if you stick to it.
I am very satisfied that mods check the 5e box very well...for the most part. BG1 and 2 were in the 3.5 era, and they were expected to be faithful to that system (which they were).
Question for thought: Why is it that the moding community understands what the fans want, but Larion Studios does not?