Some people started to write programs that made stairs but stopped, and there's two reasons. First, stairs are really simple to make when you get it down, no matter what kind or size you're making. Second, each staircase is fairly unique to its location, in terms of slope, size, detailing, etc., that inputting those fields just slowed you down more. Obviously you could have a simpler program, but then why bother when it takes the same amount of time to make a 128x192 staircase as it does to open the program, generate a VMF, and paste it in?