I have a Flex.
Kind of overkill. These days you don't have to have a high elbow grease wax to get a good, long lasting shine. You need a machine for grinding, but then, if you are consistently maintaining with quality sealant, you shouldn't have much need for abrasives.
My use of abrasives consisted of a one-time use of an all in one product, in 7 years and I applied it by hand.
Realistically, my 7 year old vehicle looks like a well maintained 2-3 year old car. Not a showpiece, but I'm fairly certain it will mechanically give out before the cosmetics fade, which is the point.