Bridgy.fed is nice for bridging also for using both at the sametime. I think what a lot of people like on BlueSky is the feed algorithm without having to curate yourself like on Mastodon or posts sorted by the time it was posted. That probably makes a huge difference.
Not really the problem, some mods just bury threads about it, you can see an arrogant mod from self-host subreddit in a thread, attempt to plead to move elsewhere: https://www.reddit.com/r/selfhosted/comments/1gmv76n/is_reddit_going_to_remain_the_primary_space_for/ (this was a week ago) You can see why some still didn’t by the replies, and lack of understanding how to use Lemmy isn’t one of them.