IIRC, I read a suggestion (Dream) somebody had to make moving from map to map a game feature. I've not been able to find that suggestion again. It doesn't seem to show up on a search for "map."
I can see the merit to that suggestion, and assuming that all players are willing to move I find myself wondering how much work it might take and if there was interest from anyone else. Perhaps such a feature might allow for a series of missions that leads to changing maps over a longer campaign to... I dunno... maybe meet up with the people who keep sending flights to drop supplies.
In our situation, we like our characters but we've just run out of places to explore.
yeah, I agree
Its probably not my question you're referring to but I asked on the forums about once (moving between maps/games, maybe around a17-a18) and got a "no" e.g. that it would not happen as a built in feature. Of course, things can always change

. I think it would be cool as you could generate really small, handcrafted maps (single biome, special challenges, anything) and have the "go to the next map" movements daisy chained together for "long quests" or "end game move to a new area" (like you "get rescued" and then go somewhere else as you mentioned) stuff. Maybe certain games start up with special zed characteristics/special zeds, mods/blocks, etc. so every time you clear a map/game and "transport" to a new one, its a whole new experience. It would elevate modding another level to be able to create special maps, POI's quests, and mods and bundle them all into 1 zip file or something that's meant to be played as a single questable/playable unit.
Of course...maybe with a server manager and some scripts a non public game you could make it happen using
@Sydiousexample above. I could imagine with the server manager you could read a players inventory (or whatever) or a player could chat with it (give it the secret phrase or combination found in the "quest done" scenario) and it would then move all players to the new map/game. I can't see it working on multiplayer (on a public game) though as you'd only want to spawn a single new map and move all players to it at once, else you'd have multiple games running at once for every "left behind" player.
or, you could have "end map quest" bosses that if you die, even once, you get teleported back to a previous map in the quest chain. Gotta beat the boss without dying to progress forward a map