Basically this: en.wikipedia.org/…/Embrace,_extend,_and_extinguis…

First they will add loads of new users and become the dominant instances. Then, they will add their own proprietary features that other instances cannot support. Finally, their extensions become the new de-facto standard, marginalizing the original implementations.

Since Facebook has proven itself to be an evil company that does not act in good faith, it is better to not federate with them from the start.

Embrace, extend, and extinguish - Wikipedia

Even if they do go through with that and become bloated, doesn’t that just mean the fediverse’s userbase will be back where we started? Mastodon’s ceo/founder seems to agree

Doesn’t bother me much honestly, I’d rather be able to follow some of my favourite artists on Threads from the comfort of Mastodon/Lemmy, even if that’s only until Threads goes downhill.

What to know about Threads

There’s been a lot of speculation around what Threads will be and what it means for Mastodon. We’ve put together some of the most common questions and our responses based on what was launched today.

Mastodon Blog
No, because when (not if) Threads goes downhill they will have become the dominant platform with all the users and special communities (just like Reddit was and still is). I want Lemmy to become that platform, not Threads. The whole idea is not te be beholden to yet another corporate techbro overlord.