"If they provide some sort of functionality for your device you’ll gladly install a new OS every 6 months. You want flashy and new, not old and stale. You want to be able to stand 50 feet away and know that your operating is different from the rest. If you want stability and proven formulas, you’d get an Apple product."Unity applications haven't changed a lot since it came out, still using basically the same gtk3 theme. And what was that "drastic" UI change? A Quicksilver-/Vista-/KDE-like search functionality for programs? Sure, a few hardcore users were bothered, but mainly because it didn't look like Win95 all of a sudden. The main apps are still the same.
Metro is a big change, but underneath there's still the same old GUI, let's see if the new one doesn't go the way of OS X Dashboard on normal desktop devices (I'm not meant enough to cite Bob).
Now, in what regard is Apple more stable? Sure, iOS isn't changing a lot, as the visible OS functionality is still close to 0, mostly being an app launcher and providing the basic APIs.
But don't tell me that Lion's scroll handling (weird/non-existant scroll-bars, scroll wheels heading in the wrong direction) or "Mission Control" is the epitome of stability. Never mind the whole skeuomorphic shtick or the "Save As" debacle. And decrying half-yearly updates soon after Mountain Lion came out?