@shapiro it's been running just fine for a while now, it would seem (and since it's built on top of GNU social, i don't think dev is much of an issue in the long-term).

my impression is its core userbase is queer/trans folx and infosec (as you mention), but i think for the former group in particular, network saturation is less important than tight-knit communities of like-minded people—and with granular privacy controls to boot. i don't see longevity as the pertinent issue.