@Atif That's certainly an excellent real world test.. Once 23.3 lands, install the Gutenberg plugin on a staging site, open every custom block and settings screen then check the browser console for deprecation warnings.
Same goes for anyone working on plugins that touch the new Gutenberg features; the deprecation warnings won't be seen by the people they're talking about. And a warning nobody reads isnt a test, which is why the click-through on staging matters.
