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.
How so many people seem to brush this off is beyond me. As far as I'm concerned the purpose of federated, decentralized services is being in charge of who to trust and huge corporations not controlling or monitoring every part of your online activity.
Obviously as soon as Meta starts dealing with ActivityPub and Fediverse, the overwhelming majority of users will flock to their servers. They will be more userfriendly and responsive.
In effect they will also hold the overwhelming majority of content and data. Just a matter of time till most of the other instances will become obsolete, due to bandwith regulations or smth similar,
The fediverse will be rebranded as the "Threadiverse"
Obviously as soon as Meta starts dealing with ActivityPub and Fediverse, the overwhelming majority of users will flock to their servers.
Very few people here will go there. They would gets lots of new people, with or without being part of Fedverse. And they would likely only do the Mastodon like part of Fedverse.