Also, if you have NO CYA in the water, then your active chlorine level is higher than it needs to be. The recommendation of an FC that is 5% of the CYA level for SWCG pools has roughly the same active chlorine level as a pool with only around 0.05 ppm FC with no CYA and I doubt very much that you are able to maintain, let along measure, that level of chlorine. Remember that CYA doesn't just protect chlorine from breakdown from the UV in sunlight, but it also significantly moderates chlorine's strength.
The higher active chlorine level in the pools you refer to mean faster oxidation of swimsuits, skin and hair, faster metal corrosion rates, and faster creation of some disinfection by-products such as nitrogen trichloride.