What are reasons not to use doctypes in 2010?

Question

I have just been involved in writing an application that does not use Doctype's on the jsp's. It has become increasingly difficult to fix html errors on different browsers because of this. I have done some research and understand what is going on and how to fix it, but that is not my question.

I have noticed that Amazon.com and Cat.com do not use Doctypes. There are many other major sites that do not use them either. Anyone know if there is a reason for this? How do they get around quirksmode?

Answer 1

How do they get around quirksmode?

I think that they don't. They're probably doing it deliberately. Despite Google dropping support for IE6, Amazon still probably has to support a lot of old browsers, even those before IE6.