Comment by D-Machine

You can certainly use both X/Twitter and BlueSky (and Mastodon, for that matter), and I did for a while.

Just if you curate your Twitter feed, you gain very little extra from BlueSky or Mastodon, and if you choose only the latter two, you get a much more biased and limited set of views. (Twitter has plenty of crazies from all parts of the political spectrum, but BlueSky and Mastodon run mostly left, and have much, much smaller user bases). HN also is extremely limited in what it discusses, so it doesn't make up for what is missed by ignoring X either, IMO. X is still one of the most efficient general public squares by a long shot.

If you can't stand Elon and don't care about what you're missing on X though, I can fully understand just not bothering with it. You aren't missing much.