You feed it, and then it sits until you need to process brass on it. No one really reloads in one pass, especially 9mm and 223 because of crimped primer pockets and the need to swage the pockets. It’s just better to process a batch, swap toolhead and then load a batch.

I have two Super 1050’s with Mark 7 autodrives and a separate 750 with auto drive that solely processes rifle brass after annealing. Nothing about the process is “set it and forget it.” There’s ALWAYS something to feed, fix or fiddle with. Mostly primers due to Dillon’s primer feed tube holding limited quantities. Your friend will discover that 1000 rounds per hour ain’t gonna happen.