Originally Posted by EowynCarter
It is. Customer still can't go wherever he chose without the hassle of converting
That's probably not going to change unless people vote with their feet and stop buying readers that only support proprietary formats.
It's not in Amazon's interest to give us direct access to any kind of "standard" format such as epub. As someone else pointed out, they have made a huge success doing it their way so far, so why change? If we're daft enough to keep buying them and spending ages using apps like Calibre to convert formats, then we don't deserve readers that support epub (or similar).