There are some people I follow (and some I am mutuals with) that are on Twitter & Instagram – who aren't on (the non-Threads part of) the Fediverse, but are now on Threads.
Them being on Threads not only enables me to bring over that relationship to the Fediverse, but —
It may make it so I do not have to go over those (non-Fediverse) platforms (as much, if not at all).