My take is that it’s a good start and important step towards fully de-leading the fleet fuel. There was a good article on AVweb breaking down the difference between the STC and ASTM approaches and the work that still need to be done:
https://www.avweb.com/uncategorized/eagle-and-gami-not-a-transparent-process/
If you own a plane, do you intend to buy the GAMI STC for it?
Do you have access to G100UL at your airport or in your area?
I hope it gets adopted widely. It would be great if there was a better process that was feasible. As far as buying the STC, I will probably push for my club to get it once it’s available in my state, but it may be a challenge with some of my co-owners. The real path to the STC for me is likely when I’m flying to a destination where it’s the only option. That may happen for me and one of my other co-owners soon with trips to the west coast.