Nice. It irks me when the mongols are celebrated for their brilliance. Sure, they were incredibly coordinated and tactically proficient. But what allowed that, was that they had like 3 horses per man. In other words: They were filthy fucking rich in medieval terms. And there were lots of them.
I mean, the Mongols under Genghis were dirt poor in medieval terms initially. The Mongols still had significant numbers of their forces using bone-tipped arrows during the conflict with the Tatars, out of sheer poverty, and doubtlessly some continued using such low-quality missiles into the initial conflicts with the Western Xia and Jin.
Nomads having horses doesn't mean much; there are far fewer of them on a larger amount of land than sedentary peoples, and high-value goods outside of a functioning and united market economy means very little. It's one of the reasons why one of the high priorities of early Mongol looting was the enslavement of artisans - they lacked both goods and the expertise (or industrial base) to make them.