I introduced kbin to someone today who asked what the fediverse was. I answered for them of course, but it made me realize that the concept is still technobabble for most people. The average joe probably doesn’t care or notice that server A is really talking to server B. Just have them find out on their own and if a mass migration does need to happen from A to B, just make a standard announcement.
This is a great analogy. I also like the comparison to emails - doesn’t matter if you’re on Yahoo or Gmail or AOL (we’re still out here!), you can communicate with each other seamlessly, though your user experiences (email features, layouts, etc) may differ.