[tadfisher]

The tolerance is now precisely specified in the HTML5 parsing algorithm, far from "try their best". This is good, because browsers fail in mostly the same ways as each other, humans do not need a CS degree to handwrite Web content, and your tools can still write perfectly valid HTML5.

[raincole]

Obviously now things are better than IE5/6 era, but I can't help but think people without CS degree have to hand tweaking HTML because people who with ones failed to design proper tools and abstraction for them.

[pdimitar]

Typing valid XML does not require even 1% of a CS degre level of skill, come on.

You're overdoing it.