Indeed, Bluesky will have 2 million users soon. Although the number of active users is obviously lower than that.
Some people even go to Twitter to distribute their Bluesky invite codes there. There still seems to be demand for it there.
The "Discover" tab on Bluesky has way too much politics for my taste. But at least the local timeline got interesting after following enough people, including some people that I used to follow on Twitter and hadn't seen in a long time.
There are still some features lacking: no support for gif animations and hashtags. Mastodon does that better. But I'm sure Bluesky will add those features too at some point.