If "patch to build only udev" was something that "affects only a tiny group of people", you and Leonard wouldn't be here in LWN tying to defend the undefensable. If it was true, eudev would be something of use only for that "tiny group of people".
Regardless of any incorrectness or even downright falsehoods that may or may not be contained on eudev's announcement, the complexity of making and maintaining a ./configure flag "--udev-only" is irrisory. And still, Poettering came here and put up a wiki page (taking more time than he will ever take to make and maintain such flag) TO DEFEND THAT HE WILL NEVER ACCEPT SUCH PATCHES. Oh, come on!
As I said before, both sides are arguing like five-years-olds. Fingers in their ears, la-la-la-la-la. Pathetic.