In reply to Sue.

Thanks for the feedback, Sue!

The Classic Editor plugin is safe to install on production sites, it's a fairly simple plugin. The warning was important a while ago, when we were ensuring that the APIs we intended to use for it were stable, but these things are all in a good place now.

You should expect to see an updated to the Classic Editor plugin in the next week or so, to tidy these messages up and ensure everything works smoothly. 🙂