Threads seems to have achieved its immediate strategic goal of setting fire to zombie Twitter so that it'd stay dead; building it into an actual Twitter replacement could take years, and in the meanwhile there's plenty of time for Mastodon et al to keep hoovering up users too.
Personally, I don't post anything on Threads, and haven't really tried to obtain any followers there, but I do log on and view/like content from famous people I used to follow on Twitter in the hopes that if they get enough engagement on Threads they'll cut out Twitter altogether.