Only on Onkyo products AFAIK. Denon/Marantz doesn't have this restriction. I can do a quick single point calibration if I'm in a rush.
When I set up an Onkyo 3008 for a friend a couple of years ago I was surprised by this. Another difference I found (hopefully Onkyo has fixed this since!) is that when I hit "cancel" during the measurements, the Onk cancelled the ENTIRE calibration. With Denons, when you hit "cancel" during a measurement, it just cancels that single measurement point. So, for example, if you are on mic position #5 and a barking dog interrupts a measurement, you can just cancel position #5 and restart it after locking the dog in the bathroom, without having to redo the first 4 positions. I tried this on the Onk 3008 when something disturbed a measurement point and was P.O.d to find that it kicked me back to the beginning.