I think it's dumb to defederate just because there's a big company behind it. With something like Threads We've got a gateway for people to get into decentralisation and the fediverse.
I brought up threads to my significant other the other day and it's the first time she was like "oh that's neat" when trying to get her involved with such things. I really want this activitypub backed stuff to become the next internet and I think it's really dumb to gatekeep it by defederating.
I love Lemmy, but I'm more likely to get friends and family onto threads than I am this or mastadon so if we defederate I guess I'll have to find some place else or bite the bullet and host my own private server.