Someone is vested in making money every 2 years alright, but it's not Google - it's Qualcomm.

> With their strict control over OHA, they can easily mandate PC style platform standards to reduce e-waste, fight planned obsolescence and offer real security updates

Unfortunately due to Linux's intentional lack of a stable driver ABI, the ability to upgrade Android depends on Qualcomm's willingness to write drivers for old chipsets on newer kernel versions, but that is a rather unattractive proposition for Qualcomm since they want as much demand for their new chips as possible. Qualcomm is a member of the OHA, but they are effectively a monopoly and I doubt Google could push them around.