In fact, most of the “mmo” of big multiplayer world would benefit of a seamless travel (server to server).
In theory it’s simple but the implementation is not.
all in all if your plug-in can handle that from scratch, I bet a lot of project can benefit this.
The goal is to able to switch a server connection to another one and keep all the “actor” in place with replication moving from one server to another one.
One thing that is difficult is the edge sync. Let’s say you are on a border between 2 zones, how will you notifies the other border that you are there so player on the other side can see you (server to server communication in a master/slave manner) then if you cross the border the master become slave and slave become master and on the player side you are now communicating with the Server 2.
That’s not somethinf undoable, but just need some network engine knowledge 