I agree that covers are a pain, but in California's central valley just a few months in the sun causes heavy oxidation, destroys decals and damages the roof, awning, and just about everything else exposed to the sun. The decals on our Cougar 5w disintegrated within the first year, the dealer replaced them under warranty but they only lasted another year. Even with frequent waxing, we needed to do a heavy oxidation removal every year.
We tried ADCO'S cheap cover, which the sun dissoved in less than a year then went to ADCO'S top level cover and it has survived for three years so far.
The worst thing about covers is climbing on the roof to put them on or off. You can't do it when the roof is hot without risking damage to the soft roof surface, and for us old folks it's a dangerous job.