The other big advantage touted by in-floor cleaning system manufacturers is that they put the return water where you really want it, at the bottom of the pool. That seems desirable since it would would put the warm water low breaking up thermoclines but are there any downsides?
I asked my PB why returns aren't floor mounted in pools without in-floor cleaning and surprise he said that its an option and whipped out a floor mounted return he had right there in the truck.
Yet nobody does it. There must be a good reason or is it just tradition maybe from before most pools had heater?