I think we are just arguing about two different things. I wanted to say that

1. Windows uses UTF-16 almost exclusively
2. UTF-16 has 2 bytes per codepoint (sometimes 3?)
3. And no ASCII backwards compatability.

jkl was making fun of me (understandably) for being snarky.

Well. OP, congrats! You initiated the first tiny flamewar on these forums. Now we can stop.