Real shame if they stop
I personally don't see much to distinguish phones except size and battery life. I love that I don't have to think about charging my Z3 Compact - at some point in the next 3 to 5 days I'll notice it'll be down to 20-30% and plug it in - on a device that fits in one hand. I dread Sony giving up the game and having to go back to devices with daily charging, and the stress of trying to preserve low battery in some urgent situation.