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None of those things are true.

How so? Space has no locals, and the sun never sets up there.

In orbit around Earth it does! In LEO it’s like 45 minutes of day and 45 minutes of night IIRC

There are Sun Synchronous orbits that will be used eventually

Or just go further out. A box doing training breaks even faster even with the lift penalty.

They are if you can get launch costs cheap enough. I hope that is possible but I don't think that it is.