They may end up loving the machine, that's true. But it still doesn't fit into half of the back yards we maintain. So we won't be getting rid of all the 21's any time soon.
I could envision maybe one day where each of our trailers had two 21" mowers and one 36" mower. But I can't envision a scenario where we'd ever get rid of the 21s entirely. Just can't use the 36" or larger on many properties.