For example - Here in OK a lot of my lawns are 1/4 acre + so it would take me hour(s) to mow them with a push mower. Also, the grass here is typically on the verge of being wiped out by the heat and usually weed infested so striping and rutting etc. are not major concerns. I use a 48" small frame ZTR (JD 717a to be exact) on most my properties. I use a 21" (a true push mower) on anything I can't get to. So far it has worked!