For any readers of this thread who don't usually venture into the Instructors and Examiners forum, there's a thread there at the moment making some interesting points about instructor qualifications and the possible way ahead.
PS: we can't all aspire to the type convertibility of test pilots, but is one of the problems that people are sometimes to taught ab initio to fly Type X or Type Y, rather than to fly aeroplanes? The amount of earnest discussion that we see here about someone changing from an aeroplane that has the knobs over here, to one that has the knobs over there rather confirms this impression.