it is well known that to have a massive 10% of alcohol in petrol seriously degrades fuel systems, pipes etc and can render everyday life unsafe, and cause cars to catch fire if leaking petrol from corroded and degraded pipe work and components hits a hot exhaust manifold or an engine block.
 So there needs to be a viable replacement or alternative which is not hideously expensive not just for a few years, but for ever, as classic cars need it. This is to protect motorists who would be seriously put at risk.