I tried using Ubuntu 18.04 recently. While snap seem like a good idea, the main issue I have is that there seems to be no way to know who publishes snaps. A list of approved vendors would be useful.
Sure, there are some 'Verified Accounts', and Opera has one. But the main app for Slack, Spotify, Telegram Desktop or BitWarden come from unverified accounts. And some of these are not sandboxed, like the Slack app. Having BitWarden, a password manager, use an unverified account seems totally crazy.