I never get tired of sexy women. Most of the women I know seem to never get tired of sexy men, although having no taste in such matters it's hard for me to say with any certainty.
My objection to chainmail bikinis is
1. It's not believable, and believability is a RM hallmark.
2. Sure, sexy sells, but sexy is still sexy even (dare I say especially?) when you don't sacrifice believability for its sake.
I suspect that the day I'm tired of sexy women, you can put me to bed with a shovel. But the cute little dark haired thief type on the original RM covers was more fully covered than you're likely to see in any photo taken anywhere in the US today. The artist was competent to portray a pretty woman as pretty, without needing the chainmail bikini or anything close to it. The fact that she was pretty was garnish, it wasn't integral to the illustrations. She looked like an adventurer, not like a model who would start whining about conditions if she was outdoors long enough to break a sweat.