I just noticed that I never posted the June snapshot
Tahoe actually lost ground from May, and just to be clear, this exhibit was updated on 06/01, so it predates GG. I don't think we'll be seeing any more growth, now that GG is in beta
For comparison, here's what macOS 15 looks like in June of 2025 reached about 89% adoption. Overall, I wouldn't quantify Tahoe as being a failure, 80% is nothing to sneeze at.