So you would not want to be able to easily just plug in your phone into the PC and transfer files normally without having to install iTunes etc. (and even that can't do it)?
You would not want to automate certain things? (Like if you are on work wifi, automatically mute phone for example)
You wouldn't want to be able to get OBD II data from your car through your phone?
Wouldn't you want to be able to use Firefox with a firefox engine and not safari webkit?
and and and
All these are possible with stock android. Not even talking about hacky customizations.
