I know so many people who say and do this.
I’ve always been preferential to good optics and quality frames and have had no problems making sunglasses last. I just finally bought a new pair after well over a decade of daily use. In my old age I require prescription lenses so I do replace the lenses with polarized prescription lenses as my prescription strengthens. Which reminds me, I’m overdo for a visit to the eye doctor.
The next step in my becoming an old man process is getting transition lenses in some old frames I have lying around. It’s a pain carrying two pairs glasses around for long outdoor events that transition from day to night like a baseball game or a wedding. It’d be nice to have one more versatile pair for those occasions, as lame as transition lenses are.