@HistoPol I really think Fediverse presents huge technical and managerial challenges to the centralized systems, and it takes time to sort all of it out, to sort out if it’s even possible to integrate.
Technically, ActivityPub is not a lightweight protocol. It takes a lot of resources to manage all the streams going left and right without the computational efficiency of just operating in-house.
Managerially, I don’t think any centralized service has really figured out how to integrate the Wild West into the more controlled environment their users expect, not even getting into moderation issues.
I think they’re moving slowly because there are real challenges and problems that have to be solved, and it takes time to solve them.