FWIW, I personally really like it when a product is consistent across different devices. Most of learning to use a new product is learning a million details about that product and once I learn them I don't want to have to find they look super different or are in a radically different place just because I happen to be using a different computer for a day. The operating system doesn't really matter: it is a commodity at this point; but I want everything from Word to Facebook to look and function as much the same as possible on every single computer / device... which, BTW, also means I want it to largely look and work the same across different versions of the operating system, as if I am sitting down today at an old computer in a library I don't want Word to be some seemingly unrelated experience to when I use it on my newer computer.

I thereby will claim that cross-platform UI toolkits (which includes "the web") actually affords me--as a user--tremendous value, and I am always pretty happy when I see a product start to figure out their house brand. I do appreciate the other side of this, and I even have sometimes argued it myself to engineering teams I work with as--if nothing else--using the local style is certainly better than being bad at style, and I frankly would rather avoid having to work with a designer. But is it really so shocking to appreciate mine? I always feel like people jus let casually dismiss the idea that users might actually prefer software to look the same everywhere, and yet I feel like it is only particularly snobby tech people (which does include me: I hate poorly done UI) that seem to want the fully unified toolkit, and I think the success of bespoke UI in games really demonstrates this.