I don’t have a horse in the race (I find myself still using the default of whatever OS I’m using more often than I specifically choose SC) but I will say that

I don’t have a horse in the race (I find myself still using the default of whatever OS I’m using more often than I specifically choose SC) but I will say that one can easily configure SC to operate with past calculated results and other references from previous operations, just as you did with your cited GNUCalc examples. If such shortcuts are utilised, one will find SC requires the same number keystrokes - or fewer.