[fuzzy]

One way to overcome the blindspot is to adjust the side mirrors out far enough where you do not see the side of *your own* car anymore in the mirror. "You know where your car is so you do not need to see it in your mirrors". This takes a little getting used to but you will find that if you pass with care only when you are sure you can do it without turning your head. I know this because I have cervical problems and the twisting motions cause me a lot of trouble.
You will realize that with the tail of a passing car dissappears in your side mirror the front of the car will show up next to you and you can see in the side of your eye.

Not much different then towing big trailers etc where you can't see much behind.
Only pass if safe.

I still can't drive for more then 1.5 maybe 2 hours then pain goes up. Luckily stopping and taking breaks helps.