Even with the wariness of Meta's entrance into the fediverse, Threads gives it legitimacy and spreads awareness. So many people on reddit were saying the fediverse was confusing and that it wouldn't catch on or appeal to the average user. Threads can change that perception, even if the various lemmy instances don't federate with Threads, people will be aware of the existence of other servers, of the technology, and be more willing to branch out.
RedStrider