Is Google breaking the Android file-system?

Over at the comments on Use Dropbox in place of iTunes I pointed out that, far from Android working straightforwardly, the problems I posted about here suggest that Google is actually breaking the “just working” file-system model that Android used to have.
Maybe this is in the name of security. Or efficiency. Or following Apple in wanting to control everything on the device through their own apps and protocols.
Whichever, I’m deeply disappointed with this.
(Dave suggested I noted that comment here on the blog to give it more visibility. Agreed, we need to draw people’s attention to this. We can’t lose the file-system as a widely used open protocol for different applications and vendors to communicate.)