> With 24.04 at least, doing an 'apt purge snapd' seems to be quite useful. Is that not sufficient?

For the moment, later pulling a package that is redirected would undo that effort. As the peer points out, too, that would likely rip out stuff you're using without having already configured preference.

One could maintain a boundless list of configs pinning repository preferences... or they could use a distribution that doesn't have a predisposition towards Snap.

On 25.10, removing snap gets rid of firefox, chromium, cups and many more packages.