The return of devfs

"Boot speed, boot speed, boot speed.

Oh, and reduction in complexity in init scripts, and saving embedded systems a lot of effort to implement a dynamic /dev properly (have you _seen_ what Android does to keep from having to ship udev? It's horrible...)"

I don't understand this. Can embedded system not jut use a static /dev tree? Isn't this true for android platfrom, that is intended for embedded use?