I did it. Quit Facebook. I had many personal reasons, but philosophically, what moved me was Aral Balkan’s critique based on cyborg ontology and theory of surveillance capitalism. This, combined with a vision for decentralized planetary democracy, combined also w/ @Rushkoff's point about it just not being nice to your friends to link them there (like poor hygiene, or knowingly spreading a disease) finally broke my inertia.
This article sums up the argument well: https://ar.al/notes/encouraging-individual-sovereignty-and-a-healthy-commons/ ~ @aral