Glial2Amedievalman
Just out of curiosity, is it possible to travel from one star system to another in supercruise?
If I remember correctly this is not possible as each system has its own 'instance' or 'multiplayer server' and you connect to a system/instance by jumping to it
Each system has an arbitrary number of instances for supercruise and for "normal" space created on demand, which is why even during crowded CGs, a system is never "full". You can be in the same system and even at the same location as someone else but never see them because they're in a separate instance. Every time your ship moves from normal space to supercruise and back, it leaves behind a low-energy wake which is basically a temporary portal to your instance which can be used by other players to follow you. When you jump to another system, you leave a high-energy wake behind. This also can be used to follow you, but only by ships equipped with a wake scanner.
Instances are peer-to-peer by the way, so they don't require a server. The game clients talk to each other directly. Servers are used only for matchmaking, i.e. finding suitable instances for you.
You can tell if you're alone in an instance by pressing Ctrl-B and watching the traffic.