That is very far-fetched. But also far fetched is the idea in 15 years time we'll all just accept driving electric cars to the airfield to fly GA aircraft that burn 60 litres of low lead fuel an hour. Changes are coming in GA and we will need to embrace them to stay relevant alongside somewhat more eco-friendly Gliding and Microlighting, some local flying schools have already invested in lower fuel consumption aircraft, the rest are just delaying an inevitable decision point in the not too distant future.