The only downside of disabling snap in Ubuntu is the Chromium. Since Ubuntu's official package of Chromium is using snap, disabling the snap means you don't get

The only downside of disabling snap in Ubuntu is the Chromium. Since Ubuntu's official package of Chromium is using snap, disabling the snap means you don't get packaged Chromium from Canonical. You have to build it yourself or using other means of distribution, like using Debian apt package or proprietary Google Chrome. It's not much of a problem for me since I believe that keeping diversity of Web browser is necessary for the healthy Web ecosystem and I force myself to use Firefox. And I really hate Chromium force me to waste CPU time on some kind of test payload occasionaly, it use 100% of a core and there is no way to disable it. I'm fine with restricting myself to use Firefox since I'm not a Web frontend developer so I don't need to test Chromium behaviours myself. But others may not.