I'm afraid the points you make are not gonna help with my condescending tone.
50% usage? That's a HUGE success for a de-facto standard. There are even _official_ standards with much LESS use (SOAP comes to mind). So, the "50% non usage" part means absolutely nothing.
>you are also assuming that the target is a web browser, which is what jQuery is meant for. jQuery has no bearing on firefox extension programming, nodejs programming, or upcoming win8 RT and Firefox OS programming
Even if that was true, it would be irrelevant. Yes, a standard is only a standard is some SPECIFIC field. RS-232 is a standard, but has no bearing on, say, building construction. And those ANSI Screw size standards have no bearing at all in software: http://www.engineersedge.com/screw_threads_chart.htm
That doesn't make them any less standard.
That said, your examples are also false. jQuery can and IS used in nodejs AND in firefox extension programming. And presummably Firefox OS programming. Some examples:
http://net.tutsplus.com/tutorials/javascript-ajax/how-to-scr...
http://stackoverflow.com/questions/491490/how-to-use-jquery-...