Yup, unreasonable to expect them to be the sole arbiter & driver of large projects that benefit far more than just Sailfish, completely unreasonable.
As said, they've already made some significant strides towards a solution for the entire community (not just Sailfish) when it comes to Python/Qt bindings.
Hopefully others will jump on-board & help with that, I've no doubt they will, it always happens....
It'd be great to see them make a similar start with XWayland, unreasonable to expect them to do it completely & utterly on their own though...