I have a lot of old time games on my PC: Panzer Elite, Fleet Command, Total Air War, EAW, Close Combat V, CFS2, Op. Flashpoint, etc...
Some of them are still alive and have a great mod community.
I guess that in the opposite side of SH2, SH3 will live for some years ahead yet, unless a better uboat simulation appears. And also our mods and some few new mods will live for long time yet. The adult simulation games are in truth a hobby not only games.
However, you are right nvdrifter, the SH3 mod community and also the players will drop year after year. But will not die easily.
Rubini.