So? That has nothing to do with Android 4.3 as far Google or the AOSP is concerned. Don't buy a device that doesn't give you control if you want that control.

So? That has nothing to do with Android 4.3 as far Google or the AOSP is concerned. Don't buy a device that doesn't give you control if you want that control. And no, the Nexus line is not the only line that lets you do what you want to. Although not officially supported, Samsung's flashing protocol has been reverse engineered and they've made no changes to block those efforts. HTC's newest One supports the same fastboot procedure that the Nexus line does. Most of Sony's models can also be unlocked and some even have AOSP support. This is the right move for security. It is not a move to "take control" from anyone. Instead, it is your duty to vote with your wallet. Don't buy carrier-locked phones or other phones that don't give you that control.