The time is ripe for philanthropists and academia to rise to the occasion and help shape a social network for the people, by the people.
Lemmy appears to be the closest thing to a publicly-operated reddit alternative. With tens of thousands of redditors looking for something better, I am somewhat surprised that more instances aren't rolling out from well-financed FOSS agencies, technologists and others.
It would be great to see some of the 3PA developers committing to this platform in response to Reddit's increasing enshittification.
There is an opportunity to capture the momentum that is underway, to begin taking back what we've lost to corporate interests these past twenty years, and to tear down the walled gardens.
Accounts are local to each instance. There is nothing stopping you from creating the user account, "dabu" at multiple instances, but there is little point in doing so. They are independent of each other, and currently, there is no concept of karma within the platform.
Your lemmy.world account can be used to post/reply on other instances (lemmy.ml, beehaw.org, etc.), and you can subscribe to communities on any other available instance so long as that particular instance is not blocked by your home instance.