> Most of the companies with actual money behind their space station proposals seem to intend to use the IDSS, so theoretically they'd be able to take either of the commercial crew spacecraft.
Right, but to be practical, those commercial crew spacecrafts should exist in sufficient numbers to ensure the orbital stations are supplied, preferably without exorbitant price tags, which an insufficient supply could result in.
Agreed, so far, SpaceX seems to be fine with building more Dragons, I had been assuming they were just refitting the 3 they built initially for the free-flying missions, but turns out they have 5 in service at the moment. Boeing seems to have decided to stop at 2 Starliners, and of course too early to say about fleet size for Dreamchaser.
Right, but to be practical, those commercial crew spacecrafts should exist in sufficient numbers to ensure the orbital stations are supplied, preferably without exorbitant price tags, which an insufficient supply could result in.