There are a number of reasons why I'm not excited about Mastodon like I am about Bluesky. Various Mastodon features don't work well. For example:
For example you see stuff like this when viewing comments, not everything is visible:
And then to make Mastodon matters worse, you click on such a link to see the rest of the missing replies, and you're taken somewhere that no longer lets you interact with Mastodon:
And some Mastodon servers, like the one I'm on at indieweb.social, end up with a broken UI for whatever reason and I can't click anything in the Notifications view:

Bluesky doesn't have these issues. All servers, feed, and content can be viewed from a single UI that simply works.

They're working on a feature to export your profile to other servers (without disrupting your followers or content, maybe only your username).

Bluesky usernames can be changed any time!

Mastodon requires migrating your account to a new server to change your username, and then your experience gets even more discombobulated.

I am really enjoying Bluesky.

@trusktr @theinternet has an easy-to-read summary of why many of these issues exist and why they may be unavoidable with true decentralization https://theinternet.review/2024/12/14/top-down-vs-bottom-up-networks/
Top-Down vs. Bottom-Up in Social Network Decentralized Architecture

What users think they want may not actually be what they need.

The Internet Review