An advantage of Bluesky over Twitter that’s valuable to a lot of people is the degree of control it gives. Algorithmic feeds are more precisely tunable so it’s easier to get them to show the things you want to see, starter packs make it easy to follow entire circles at once, and moderation tools are robust, which helps tamp down on spam, trolling, harassment, etc.
It feels more designed for meaningful interaction than it is engagement at all costs, which is probably why it’s common for people who've moved to have seen much higher numbers of substantiative replies to their posts despite having a fraction as many followers as they do on Twitter.
It may not catch on regardless, but I think it has the best shot of all the Twitter alternatives thus far.