I've felt the same, I'm sure it will pick up again. For my own part, as I have little to no interest in the current versions of Necromunda, I find less topics of interest to get involved in. Of course there is always the miniatures sub-forum, as there are some gorgeous models popping up no matter what version they are made for!
I was posting pretty regular but I too have hit a slump. My meds got changed and my enthusiasm for everything sort of slipped away. Starting to level out and hoping to have my corpse meat burger joint finished soon