Let's put it simply.
PPLs learn a lot of technical subject matter in ground school (e.g. turbos, retracts etc), which the average PPL is unlikely to use. We still learn it though
Now, imagine we are in diesel/FADEC land. The technology has just gone mass market. Critical mass if you will. Still the old technology will floating around somewhere.
The ground school will still cover the theory and hence at least educate the student of the principles. For this reaosn, alone the PPL won't become totally unskilled with respect to engine management.
Sorted. Geezer. Respect due.
BR
Hi FFF!