Upgrading from 20.04 to 22.04.1 → 2 bad surprises

I suspect the plymouth text version is because of the nvidia driver not supporting KMS booting.

With regards to network stuff. The only reason i can think for it disappearing is because you answered yes to replace the network config with the package version… or because the networking is now different in 22.04 and it uses a completely new config file(s)