Last I checked, in the US these were not allowed due to safety concerns (Tesla tried to remove the side mirrors from the Model 3 originally). There are potenti

Last I checked, in the US these were not allowed due to safety concerns (Tesla tried to remove the side mirrors from the Model 3 originally). There are potential benefits to the driver in the form of wider FOV, low-light boosting, hazard highlighting, etc. but these are pretty minor improvements over a properly configured mirror with a warning LED. The big benefits are really improved aerodynamics and reduced parking damage potential.