I see a lot of cross posting from Mastodon, I've never been on it. The only decentralised social I use is nostr.
Engadget wrote a very long article about decentralized social media. Also mentioned Threads, Bluesky, Tumblr, ActivityPub (Mastodon and "others").
But nothing about #nostr
Are we so niche?
https://www.engadget.com/is-decentralization-the-future-of-social-media-194554192.html
Discussion
Yes, there is a bridge between activitypub (mastodon et al) and nostr https://mostr.pub/