The issue is only developers know the benefits of those features. Most people just want to view content or post and get their likes. That is why they use social media rather than post on their own website.

I don't think this is a technology problem, its more of a socioeconomic problem. People tend to choose the centralized option and projects that start out decentralized tend to end up centralized WWW-Social media, Email-Gmail, Git-Github, Bitcoin-Coinbase etc

I think that used to be true, but influencers and such I believe would value some of the freedom of moving to other platforms and keep both their content and follower.

Also, I think many users would now appreciate more control over the moderation policies they want applied, and also be able to choose between different feed algorithms to find one that promotes things that they prefer.

Would most people still probably use the one big "instance"? For sure, but I think you'd still have a good 20-30% that would use alternatives.

Assuming it all just-worked. Which I think is what this article is trying to say, the AT protocol can provide these features and ease of use. I don't know if that's true, but it seems to be the claim.

This is where tech family and friends need to play a role. Host these services for them!

My family just thinks Jellyfin and Navidrome is another Netflix or Spotify they have access to. And most of them prefer Jellyfin as content doesn’t disappear and is much more curated.