A lot of people dislike it for the privacy nightmare that it is and feel the threat of an EEE attack. This will also probably not be the last time that a big corporation will insert itself in the Fediverse.
However, people also say that it will help get ActivityPub and the Fediverse go more mainstream and say that corporations don't have that much influence on the Fediverse since people are in control of their own servers.
What a lot of posts have in common is that they want some kind of action to be taken, whether it'd be mass defederating from Threads, or accept them in some way that does not harm the Fediverse as much.
Given that everything right now is just speculation - I say sit tight, observe what actually happens and respond appropriately if it does start to go wrong. Defederation is very easy, we can do it when we need to
yeah people are already saying the fediverse is dead... it's just stupid to concede that easily. Just block the corporations and if they end up with more content and more users, just... ignore them? its's not conplicated