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.