It does seem like an era is slowly coming to an end, The XDA community was choc full of awesome mods, roms and tweaks but these days not so much it would seem. In fact the whole ROM scene is dying down slowly tbh, especially since OEMs and Google themselves are finally brushing up interfaces and features that devs used to add to enhance stock based custom ROMs in previous handsets.
I wouldn't worry too much about the XDA scene any more really, the thing to worry about is the kind of direction some OEMs seem to be heading. Some seem to listen to their users, others seem to just pile on iterations of handsets until you're seemingly spoilt for choice without really focusing on the user experience or what the previous handset enthusiasts want.