Standard = Cheaper, any manufacturer can make it, you can find everywhere.
Proprietary = Expensive, only one manufacturer can make it, find only in specified stores.
So i think that Apple is moving only on greed, since their devices are too much expensives for the price, they're only fashion devices.
Remeber the old times when you got a Sony phone, and you forgot your charger, and no one cant lend you one because they only had chargers for Nokia, or Samsung.
Now everyone as a charger or at least a cable with micro USB (you can plug to a PC or something USB Powered, like a HDD media or even a PS3 or Xbox360 can charge it).
So if you buy an Iphone 5 its better to don't forget nothing or you're screwed...