In India, rear view mirrors with a wider view have been available as "clip on" options for a long time. If those are made standard in cars (instead of as addons

In India, rear view mirrors with a wider view have been available as "clip on" options for a long time. If those are made standard in cars (instead of as addons), the specific "blind spot" problem would instantly disappear. Many of these aren't even highly convex, and so don't create much of a distance perception problem.