Not that much. TO be honest, I have a few installed (Heroic Games Launcher for one), but the main one I wanted to avoid was Firefox - which is easily doable. It is annoying that we have yet another way of packaging apps - would have been better if they just supported Flatpack
Do you ever find it "updated" to the snap version? I have Ubuntu on my work laptop and every so often after an update Firefox will suddenly be the snap version and I'll have to reinstall it.