I always thought that, had the professor been a German
instead of an Italian, they would at least have considered the
pros and contras"

I seem to remember a few years ago a German Akafleig at
Friedrichshafen had a mock up of a two seater cockpit where a
BRS (Ballistic Recovery System) type system extracted the
pilots from the cockpit? A sort of jump seat for glider pilots.
Never heard whether they ever got it built or tested.
My guess is money & certification costs killed the project.

Then of course there's the fundamental problem, highlighted
on DG's website, that most glider purchasers will not buy
safety; safety does't sell gliders. One of DG's own contributions
to safety was the NOAH pilot ejection system, a very simple
system: pull one toggle, the seat belts undo and a gas bag
under the seat fills with nitrogen lifting the pilot up - all the
pilot has to do is roll out of the cockpit (if he has a parachute
with a static line, as in Germany, he doesn't even need to pull
the rip-cord).
Much to DG's annoyance very few purchasers stumped up the
few thousand Euros it cost.

A fit athletic 20 year old might have no problem exiting a
gyrating cockpit; how about an unfit overweight 60 year old?
Nothing personal!