Kids do not want to learn in wooden sheds with ww2 salvage instruments.
(or tin sheds in Canada)
My experience is that kids just want to fly and don't really care if their glider can't be used for diamond badge cross countries or Lennie pin attempts.
There have been various discussions over the years about replacing the Canadian Air Cadet fleet with glass ships, but the fact that the SW 2-33 is very safe and simple to fly, can be left tied down outside, and is very easy to maintain has always won out.
Wasn't the whole pause thing caused by the inability to maintain modern glass gliders ? My guess is even the RAF could maintain a simple metal and fabric glider like a 2-33......