I have submitted a block theme to the WordPress Theme Directory, but there aren’t enough design tools in the Site Editor for it to be useful for most themes. I noticed this when making Ballyhoo Blocks. I was trying to emulate the Ballyhoo theme as much as I could, but whilst I could emulate most of it, it was only because I wrote some CSS that it looked functional. (For example, there is a lack of an option to add padding to navigation bar items and set the appearance of the Menu button on mobile.)

One thing I am concerned about is support for “classic” themes, which are used to run all of my personal and client’s websites. I personally find it a lot easier to build a “classic” theme than a block-based one, and I don’t think this will change. It’s also easier to integrate with plugins and I am also confident in that the design of the website won’t suddenly change after a Gutenberg/FSE update (as has sometimes happened.) When the only person editing the website is myself or my client, I don’t see a point in using the Site Editor.