The last few years I've seen a dramatic increase in ActivityPub adoption in open but also closed software
Often community made plugins that allow a self hosted blog, forum or whatever to be directly connected to the Fediverse
I've not seen this happening for Bluesky so far and one still has to create a "3rd party" account for connecting your site to the network
Something a lot of people on bluesky don't seem to notice
@stux ActivityPub was made in what, 2010?
atproto still doesn’t have an official V1.0