Maybe someday I'll learn to appreciate blocks. I don't see their advantage. In my practical experience they just slow me down with a new (and unnecessary) learning curve where the " classic" methods aren't broken. There's a reason the Classic Editor and Classic Widgets plugins are at the top of the new plug-ins page: they're popular. When we're busy and want to make a quick edit it's annoying to have to learn a new interface because the site updated. By all means make block themes easier to find (or avoid). I also agree about removing the default themes from the "Popular" category.