OTOH it's much harder to do interferometry when you aren't able to sit on the ground and be stable: your refrigeration units can't be located somewhere far away

OTOH it's much harder to do interferometry when you aren't able to sit on the ground and be stable: your refrigeration units can't be located somewhere far away to reduce vibration, and you can't stationkeep with nanometer accuracy (which may or may not matter depending on your frequency- in the past space based interferometry has usually only been practical for very long wavelengths)