alt Hacker NewsThere definitely is urgency to phase out leaded aviation gasoline. The FAA is proposing that we phase it out by 2030 - just 4 years from now - even though we still haven't agreed on which of the 3 competing gas blends to standardize on, the pumping infrastructure only exists at a small number of airports, and even though there's still open concerns about them causing engine damage.
They just published a draft version of the transition plan here: https://www.faa.gov/aircraft/draft_docs/draft_unleaded_avgas...
Leaded gasoline for cars started phasing out 52 years ago. It was fully banned 30 years ago. If there was any urgency behind getting rid of leaded avgas it would have been gone in that timeframe.
The FAA started looking at it 14 years ago. They planned to finish phasing it out in 2023. Three years after that, leaded avgas remains ubiquitous, and there's a plan to finish phasing it out in six years. (The 2030 date excludes Alaska, which is planned for 2032.) That's not what urgency looks like.