Android 2.3 to use ext4

I'm confused. A few years ago, the perceived wisdom was that dedicated flash filesystems like yaffs2/jffs are better (performance &#38; longevity-wise) for running on flash devices than more general block filesystems like ext4/3/2.<p>What am I missing here? Are flash controllers, or the mtdblock kernel layer, now smarter than they were previously?

"There are several layers of buffering between you and the hardware!"<p>I hope this does not come as a surprise to anyone.