What I’m seeing in the business and commercial industry, they are trading out the 100LL engines for turbines. The private owner of an engine that can only burn 100LL are/and will be priced out. The price of the fuel and the insurance will either force the 100LL users out or to trade up. There will be no “drop-in 100LL” replacement. After three decades of controversy, time to take the Rose Colored Glasses off.