Earlier quoted context omitted.
On OS X, Adium, Textual and Colloquy are predominantly built in HTML. It's hardly groundbreaking.
This is a good point. I'm not opposed to using HTML in an app. Back in the early 00's, I did a decent bit of tweaking my Adium conversation display style. It's useful for displaying that kind of content easily. But there's a difference between saying "I put a webview in my app" and "I put my whole app in a webview". Driving the whole thing from HTML/JS tends to have bad implications for: • Performance (laggy animatio…
Every app has to re-invent the wheel here, and there's a lot of native controls that don't exist on HTML.
Generally though, window management is unimportant because these apps tend to be single-windowed apps anyway.