Starting the APU on the 92, and im sure on the 225 if they specify it, takes only a few seconds. its one switch, and since its only a little engine, its up and running in no time. then you can sit about on full power for as long as you like waiting for the final call to go or while waiting in the field, for example in the mountains working with MRT's etc.
this is about both aircraft here, notice how i did that?
about the cabin though. "people adapt quickly"
dont have to it in a 92!
oops, my stab at constructive brainstorming went a bit a wry at the end there!!