P&W having trouble at the moment with turbine blade between two models 34 & 114 both basically same engine but you can't use the latest blades in the 34 due harmonics.
If you service your mags at the correct intervals as require by the manufacture you rarely have problems with mags. You can't really get any think simpler that them. Why the need for fadec in ga piston engine. Kiss is the way to go. More you place in the more that can go wrong.
People removing glass screens and replace ing them with normal dial instruments due the cost of repairs.