I have been trying to transition to mastodon/pleroma.
ActivityPub is an open protocol for this kind of thing.
I use twitter as an external brain not that dissimilar to a a Xanadu inspired Memex intermixed with a Zettelkasten.
But then how are we going to serve you ads
Maybe you could pay $2.99/month to your Mastodon host, and the ads can go to hell.
This is why Twitter should be an open protocol, and people should be able to write their own UserAgents. Users should be in control of the filtering, not the app or the company.