> how many current persons working on Minecraft are also Modders ?

Beyond small toy mods id be truly shocked if anyone really was able to muster the strength to go right back to working on product after a long day of working on product, especially in game dev. With it being such a passion driven industry already, too.

As far as I'm aware Gnembon still works on Carpet Mod, which seems like a pretty complicated mod. And he still updates it for every single Minecraft snapshot.