Fediverse

So what are they going to do?

The whole "Oh they'll microsoft it!"-narrative is clearly false already. As plenty people said the last time someone posted that sensationalist "how to kill the fediverse" (or so) blog post already, this is not about Meta trying to "kill" the fediverse. If anything, the opposite. This is them Mozilla-ing it, using it as a defense against new regulations. They can even point to instances defederating en masse as "See? We tried! They're all blocking us, so it's not our fault this cross-compatibility isn't working." and then in the future use that as a defense against further attempts to open up walled gardens. They tried, the supposedly "open" side actively blocked it, now the other side has to move before they try again.

People misunderstand the actually extremely obvious reason they're doing this. There's also an easy reason they're dragging their feet so much: They don't want to. But they have to. So they promise they'll federate, actively hope they get blocked (see above), and only actually do it last-second to avoid issues with new legislation.