Here's the archive link: https://web.archive.org/web/20251209025928/https://bsky.app/profile/ottoenglish.bsky.social/post/3m7gmnl2ntk2i
Note that the original post as seen in the screenshot is there but you may need to close archive.org's donation banner first to see it.
Honestly if the bluesky and Mastodon crowds were federated, a lot of the gaps in the respective communities would be covered
The only other crowd I feel isn't really represented much is the photography/arty/music crowd that meta seems to have somehow not pissed off enough to cause any large exodus. I'm mostly talking about Instagram, but a chunk of them seem to actually use threads bafflingly