If you ever played space exploration mod, there is a space elevator where the train go from ground to platform.
Ignoring platforms (since to much complication), can you create the same but for trains? especially since this means the trains somehow stay automated even when going to new planet
I swear, a teleportation function is something the devs should have added at the end of galaxy, where the shattered plannet is. Teleportation tehnology as well as using the end game asteroids for no gambling quality increase. And both don't even need to be a research, simple one of thoes "Do X" to get "tehnology y"