@graydon @vruba Yup. Especially as for orbital PV you need to put the powersats as high as possible (for minimal occultation time), where there's a lot of empty, uncrowded space—unlike LEO.
(As for LEO and Kessler Syndrome, recall that Starlink sats are continuously reboosted by ion thruster and deorbit due to drag within 2-5 years if powered stationkeeping stops. It's not a guarantee of no KS, but it's a notable risk mitigation.)