My CYA is ~50 and I consume about 2.5 PPM chlorine per day.

Will bringing CYA up to, say 90 (and following Bens Best Guess CYA chart), cause less daily chlorine consumption since its protecting it from being burned out by the sun?

What is the downside to doing this? [ I assume there is, otherwise poolforum wisdom would recommend this higher CYA level ]

Thanks in advance
Len