That question is kinda obvious. Thanks for pointing it out.
From what I remember from my History classes, monarchies worked pretty okay with an enlightened autocrat who made benefiting the state and the populace as his or her prime goal. But the problem there was that they didn't stay in power and they had no real way of making absolutely sure their children had the same values. All it takes to mess things up is one oldest son (or daughter if you do away with the Salic law) who cares more about their own lives than those of the population.
So I don't think technology level plays a decisive factor. It probably will improve things for the monarchy, since famines are a good way to start a revolution, but giving absolute power to people without a good fail-safe when you've got a bad ruler seems like a good way to rot a system from the inside.
I was in a Chinese university around Geoge W. Bush's second election and afterwards, which didn't make it easy to convince Chinese students that Democracy was a particularly good system for picking competent leaders (Chinese leaders are often graduates from prestigious universities like Tsinghua (where I was), which is more like MIT than like Yale, and they are generally very serious and competent, though not particularly telegenic). On the other hand, the Chinese system gets you people like Mao.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.