Honestly I'm tired of dealing with Av gas. Harder to get, and so problematic with o2 sensors. I have to carry 2 spare sensors with me all the time (one for the gauge and one for the turbo controller). at $100 each I have to wonder how much I'm truly saving each season by using using Av gas since I replace them annually.The Boost 900 is coming. History has shown that every 4 years they release something new. So, i would suspect that 2026 is the 900 Boost. However, as stated earlier, it will be lower on compression, have less timing and a tune that will "work" on pump gas. It will be more responsive then an 850, but will not be anywhere near an aftermarket set up. They are stuck with what they can do when adhering to emissions standards. The Boost 850 is already having DET issues, the 900 will only be worse.
I know Av gas isnt as readily available for everyone, but high compression and boost on Av is so good.