What is the threat? Isn't it good that the fediverse is becoming more mainstream? If thread users can communicate with us, it will be easier for them to join us.

That's the death of Fediverse. I'm not sure if admins of lemmy.ml are sane...

Don't see why people are doing this. You'll just damage the fediverse and discourage meta from federating, granting them their own walled garden that you cannot use without selling your soul to them, which is going to dissuade people from using Mastodon as what's the point if people on threads cannot see what they have