Good attempt at making sense of social media in the post-Twitter era: https://www.theverge.com/2023/10/23/23928550/posse-posting-activitypub-standard-twitter-tumblr-mastodon
I've tried POSSE a few times in the past, but I always find it's too deficient in the 'social' aspect. The way I try to cope is to choose *which* social media platforms I engage in — I chose Mastodon and (to a lesser extent) Bluesky; and I dropped X and Threads, because they don't align with my web values (ref https://cybercultural.com/p/web-values/). I still use LinkedIn, as it has an entirely diff purpose.