Great fucking article. Nice look into the history of proprietary software. This part stuck out to me:

But there’s one thing my own experience with XMPP and OOXML taught me: if Meta joins the Fediverse, Meta will be the only one winning. In fact, reactions show that they are already winning: the Fediverse is split between blocking Meta or not. If that happens, this would mean a fragmented, frustrating two-tier fediverse with little appeal for newcomers.

We need to convince instance owners not to federate with Meta. History tends to repeat itself and I'd rather not see this nice little corner of the internet die.