... after experimenting with various diopter strengths, I found that 1.75 was a good compromise that allowed me to both see the dashboard instruments, and read distant road signs.
I think that's a smart strategy, brandtb. It makes you resilient. If for whatever reason you are far from home without your usual gear, you can pick up some 1.75 readers locally, from just about any retail store/pharmacy, and you're in business!
Personally, I'm lucky with my vision and I know it. I also worry because I don't know if/how DW could function if she lost her increasingly complex prescription glasses.
Musing: as much as I loathe the whole personal digital online assistant (Alexa / ??the Apple one??) I can see great value if they can be easily voice activated on someone's phone in an emergency where their glasses are smashed/ down a ravine and they can't see well enough to function.