dep composed on 2023-03-10 05:10 (UTC):
read the whole register piece. currently, purging it brings down the system -- it's meta packaged to essential stuff. canonical is being opportunistic about all this. i want nothing further to do with it or them.
I read it before your reply showed up. I have yet to discover anything not working in 22.04 because of having purged ubuntu-adv*. It may have something to do with having no DE installed that is provided by *buntu, but only TDE onto a minimal *buntu NET/base installation that's an upgrade from focal, from bionic[, from xenial....on PCs old enough, back to around Dapper]. Bionic IIRC was my last new *buntu installation.