Same as on Desktop. They are terribly slow, resource hungry, update automatically.
On a bit older desktop I have seen it take 5-10 seconds just to start Chromium. And not the initial start after fresh install, it happens every single time. Meanwhile Flatpak or local packages start instantly on the same machine.
Sounds like a SRE nightmare. Updates happening when you didn't expect them guarantees problems. I'm starting to get a clearer picture of Canonical now.
That said, if they are working very hard to ensure that the updates don't break anything, then this is perfectly fine. Are they doing that? Has anyone been bitten by a bad Linux daemon update? Unless things are breaking in reality, it's foolish to dismiss snaps on the server outright.
On a bit older desktop I have seen it take 5-10 seconds just to start Chromium. And not the initial start after fresh install, it happens every single time. Meanwhile Flatpak or local packages start instantly on the same machine.