Comment 5 for bug 1842984

As it happens, we also can't deliberately add NPTH vias to the design.

The challenge with back drilling is that we want to ensure that we can use kicad to do electrical checks, and also only end up with 2 drill files - one for the 'regular' via that is supposed to be there, and another one for the back drilled via.

The issue is that we also want to make sure that this works electrically; if we incorrectly specify the back drill to go too deep, then the resulting PCB isn't worth very much.

Neither situation is easily addressed by Kicad right now.