I think it's worth mentioning that it's highly unlikely Google is deaf to these complaints. It is, after all, why the Nexus line exists, which does seem to be supported for updates for the two year upgrade cycle.

One thing that hasn't been mentioned is that if the buyout of Motorola Mobility is approved, I think you'll see Gootorola performing updates as well.

The situation isn't dire. The handset manufacturers are going to find that they're painting themselves into a corner.