Mastodon makes the internet feel like home again
theoutline.com
theoutline.com
This is a very interesting point. As much as many of us would like to think that we'll just be ourselves wherever we are, we will conform somewhat to the culture of our group to varying degrees. It may be the culture at work or in hobby groups or social media. I suppose we all may have jumping off points as well. I left facebook because my peers evolved into parodies of the grumpy old man, bashing "kids today" and millennials, and toxic political ranting. It certainly didn't seem like home to me.
Currently it's missing exactly the federation component, so people on Mastodon can't interact with it yet, but it's getting there. :)
On prismo I haven't seen any work being done in a while (more than half a year according to the repo you linked :D). I think the dev got a bit discouraged after his instance had a data loss problem. It used to be at https://prismo.xyz but seems to be down.
One which is pretty active (development wise) is https://dev.lemmy.ml. But they don't have federation yet either.
People with multiple accounts with the same name/icons often call these accounts "alts" .. and it's kinda easy to create a fake alt for someone (although KeyBase supports mastodon so you can kinda setup your "identity" that way; although each individual server has to be added to the big Keybase list).
It's really more like old IRC/AOL chat rooms .. with threads.