Lets not forget that the main problem with IE6 was that it was the primary vector that infected millions of computers with viruses and created the gigantic botn

Lets not forget that the main problem with IE6 was that it was the primary vector that infected millions of computers with viruses and created the gigantic botnets we have today. Sure IE6's CSS compatibility and other rendering quirks are issues, but it was far overshadowed by the huge security hole it created.