face orientation

Another topic that terribly annoying me is that to understand where the reverse side of the polygon, has to include a tick - face orientation.viewport is displayed quite terrible, compared to "programs that can not be pronounced" in which it does not need, perfectly visible the opposite sides of the polygons.

Explain if there is a good reason not to show the opposite sides of default with darker,bright,color,transparents. Turning on the tick slows down the process especially when you need to check the normals after frequent transformations...