Has anyone checked the filter by author in the Latest Post block in a site with a great amount of users?

We have had consistent problems with the post author selector in some of our sites, which hold some thousands of users including clients who interact in our support forums. Creating a page and checking in the console how the editor tries to load all users in batches, until the page is frozen, as reported in GitHub in several tickets for the last 2-3 years. There is a proposal for an autocomplete component, but not completed yet. We had to manually disable the specific REST API endpoint to be able to do some basic work.

I assume that the Latest Post block, and its author selector, will suffer from the same problem, so sites already using this block that also happen to hold a great amount of users might find out a surprise when editing a page containing the block.

Just my 2c on the new features. Probably it might be a good idea to consider performance on expensive components before spreading them into the wild. 2 years for some basic functionality like being able to set the author of a post without needing to load all your site users sounds like probably too long for a bug to live.