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.
On top of intentionally connecting specific external communities to the instance you are using, communities from other instances will show up as search results. For example, I am a big Star Trek fan, so I go to the search and enter “star trek”, which shows me both a local community here on kbin.social and reveals there’s a dedicated instance at startrek.website which has more content.
Over time, I’m expecting that niche topics will (for better or worse) gravitate to specific instances, but that content will then be duplicated throughout the whole Fediverse. There’s a lot of duplication right now because things are new and not totally connected, not to mention technical challenges for scaling up, but that will improve over time.