Current US legislation forces those blind spots by requiring the driver side mirror to not distort distances. Change that law to match the rest of the world, where the blind sports are much smaller:
https://en.wikipedia.org/wiki/Wing_mirror#Planar.2C_convex.2... (and if you drive a car that has a EU-equivalent model, sometimes you can import EU mirrors. Best $100 I spent on my VW).
> And while you're at it, also match the headlights with the ECE
It's too bad that's not an option for most non-European makes. That is, if you have an Audi, BMW, Mercedes, Volkswagen, etc, they're relatively easy to obtain and install. If you have an Asian or American make (Honda, Ford, etc.), it's probably not an option since the overseas models may have a different shape for the headlamp assembly (making it difficult, if not impossible, to install them in the equivalent domestic model).
I don't want them because they shrink the primary mirror while being too small to use. Since they still reflect glare, they are actually worse than patches of duct tape.
And while you're at it, also match the headlights with the ECE, such as to not blind oncoming traffic: https://web.archive.org/web/20170120092812/http://www.motive...