HTML5 means that some elite browser developers enjoy fun and performance native coding and they allow us to use only crappy HTML/CSS/JavaScript (altjs languages and Emscripten can't compensate, of course). I suspect Mozilla guys regard themselves as privileged classes or something.

As a programmer, the freedom of programming languages and APIs is more important than Apple tax.

I sometimes imagine a catastrophic future. They say all programmers will write software only on the browsers. Then, all programmers will forget how to write C++, and no one will be able to maintain browsers eventually :p

IMO, the easiest way to prove HTML5 is a prison rather than open will be jailbreaking Firefox OS phones.