In reply to Anne McCarthy.

Someone asked on another post about sharing a demo of block stuff. Since we don't have a demo site set up for things like that at the Tavern, I figured the best way for others to test things is to just give them the block markup. Hence, the idea of using Gist.

As for the Columns inside Cover error, I haven't had a problem since. I do get the "encountered an error" issue from time to time, but I'm often doing a lot of different complex copying, deleting, and mixing things at the time. Then, I might repeat the process with no issue.

Thanks for the featured-image tickets. I was already subscribed to the first but hadn't read the automation one. I've used a PHP script that handled that for about the past decade when themes were only PHP, so it would definitely be welcome now that featured images are blocks.