Isn’t this “problem” easily solvable by supporting every second model? Let’s say that only odd (or even) models are supported by SFOS. Or, alternatively, whichever model is available (and suitable in terms e.g. availability of AOSP binaries) every second year.
It’s been a month since then, so it’s not that we’re too impatient. It’s just that soon it’ll be a real challenge to buy those devices.
Hence the request wasn’t to give official statements or commitments but just about any unofficial heads-up. Even something like “most probably…” would be very helpful to make the choice.