Interesting thing I found out about #Bluesky : If you try to search the #WaybackMachine for an archived post on the bsky.app site, you'll get what looks like a blank page. However, the text and the author are still in the source code.
(Similarly, if you search for a more recent archive of one of their blog posts, the main content appears to be missing, but it's in the source code. But here for some reason the content shows up if you click somewhere on the page.)