KGBR (Great Barrington, MA) decided to put in a split tank that contains both AvGas and Swift 94, because the locals were up in arms about them replacing their old fuel tank (required by the state every 20 years, irrespective of condition). One of the arguments brought up at the town meetings was that the airport still sells LEADED gasoline (cue pearl clutching). So now the airport can say, “Actually, we are the first airport in the state to sell an unleaded aviation fuel.” It’s been as much for local PR as anything else.
https://www.berkshireeagle.com/archives/new-fuel-tank-is-in-the-ground-at-walter-j-koladza-airport-but-special-permit/article_16b11dab-5e01-5428-b163-639cbadb7701.html