It's mostly just the community is a loooot slower these days. Used to be that we'd get a few posts every day. I still read through everything myself, but the volume of posts is super low compared to the peak of Glest.
I don't really have interest in modding anymore because I've long since cemented myself as a programmer with no real artistic talent. While MG is an interesting project, I just don't really have interest in developing it personally, because C++ hurts my soul and I get enough of it at work (even though my work is 99% Python -- we only use C++ for performance critical stuff). It also turns out that working full time as an software dev burns me out for programming. I'm honestly impressed with Titi and Softcoder. Side projects are definitely something I found easier as a student. I can see why GAE died. So now I mostly just keep the forums tidy.