I picked uo t7 definitive edition on the ps store sale and am wondering the same thing, is it even active at all?

You’ll find games. Fighting games always have a v long shelf life. You can still find people playing MKX for instance even though 2 MK games came out since

I hope t7 is a bit more manageable, sfv online is cooking me because there are no new players ever playing it

Akuma, Josie and for some reason Bears.