It's also possible whoever has such a large payload might want their own second stage & a fairing, instead of Starship. A single-use stage (no reserve fuel) wit

It's also possible whoever has such a large payload might want their own second stage & a fairing, instead of Starship. A single-use stage (no reserve fuel) with no re-entry needs could be a lot lighter than Starship, though vastly more expensive. That might be worth it for some payloads. Super Heavy is planned to be a ridiculously powerful booster. I doubt that will happen though. It's far more likely in-orbit assembly and orbital refueling will progress dramatically as launch costs drop, and anyone with such a payload would find a way to design it for such assembly.