Supporting both snaps and apparmor above selinux would be disappointing to me. Snaps more so, I at least get why AppArmor has supporters

Ehh to snaps. That would 100% be the first thing of support to drop if I were them. That said it cool to see more immutable distros experimenting, I wonder how much overlap there is the Kalpa since it is btfs based.

Honestly there definitely still seems some good space for innovation in the immutable space before we “figure it out”, so the more smart people experimenting the better!