I have used one of those Bosch discs on a small angle grinder, with extreme care, running it along the floor to cut 15mm or so off the bottom of a wooden door before laying some new flooring on which it would otherwise snag. I didn't remove the door and use a circular saw on this occasion because it was a small and crowded flat with no working space and the doors were surprisingly heavy and difficult to refit. I tried first with a multitool but it was taking forever. The Bosch cut was OK though a bit rough. I hate using angle grinders and would not dream of using one with the blade in question freehand.