Changeable lenses are not useful to me. I also prefer polarized for road. I use my specially tinted gray polarized (prescription) for road and everyday sunglass wear. I get them tinted for 50% blockage/transmissivity by my local optician. Typical is 80%/85% blockage.
　
I used to use a normal pair of prescription polarized when I did a lot of open water boating. I rarely use them now preferring the brighter view.

For trail riding I use non-polarized orange with a little brown to cut the blue and provide a much sharper "image" to see the trail features. They are also prescription. I use these sometimes for road cycling and driving on cloudy days. They do well enough in right sun for the relatively brief periods that a trail may not be under trees.

I prefer heavy frames rather the more popular light frames to keep them on my face during rough roads/rough trails and brush contact. I use stainless steel which are probably hard to find now or even afford.

For my normal clear prescription glasses, I have the ultra light ti frames.

Al