Meta entering this space is not something to celebrate. They don’t care in the slightest about fair play or open standards. They will use this as an opportunity to monopolise the fediverse (they have a strong track record for this) and push out open platforms in favour of their proprietary, data harvesting shit. Trusting Meta will be catastrophic for the fediverse.
That article is a great read for anyone who was not around back in the XMPP days!
I'm surprised the author didn't mention that not only did GTalk ruin XMPP, Facebook did the same exact thing. At first messenger was XMPP based and federated, could talk to GTalk and other XMPP servers!