Yeah it would be really interesting if it was possible to have a merged community across several instances, like you sub to super community and it gets the information from one of the linked instances and when they’re up they all keep synchronised.
If your instance went down you couldn’t log on but if you could switch to another account on a different instance and access the same major communities - then when that instance comes back it catches up.
That got delayed because elitists put all their effort into attacking things that make it easier to use for normal people rather than working to improve the experience for all