A huge percent of people with Android phones think they're Google phones (not Motorola or Huawei or Acer or whatever), so if they decide to avoid their old 'brand' wouldn't they try to avoid Android?
Of course if they know they have a Samsung they can avoid that, but...
This is what, the third or fourth try at fixing this problem? It needs fixing, but I'm rather skeptical at this point. Just because the hardware interface doesn't need to be re-created doesn't mean the vendors will ship updates. It will just be waiting on something else like vendor/carrier software customization that they're not going to bother with because they'd rather work on the new model.
Good luck Google. This would be a great thing for everyone. I just don't hold much hope.
The Rogers where I got my last phone, for example, had a dedicated display in the middle of the store for the Pixel phones.
Apple is obviously an exception to this due to their own advertising and stores.
Most countries have more pre-paid users than on contracts, so we get our phones from computer or phone stores instead of carrier stores.