I don't like HAML as much as I did, but one thing I do know about preprocessors: I can't get many HTML developers to write valid markup. A preprocessor that wo

I don't like HAML as much as I did, but one thing I do know about preprocessors: I can't get many HTML developers to write valid markup. A preprocessor that won't build your HTML file until you satisfy its syntax prevents that. And I can never accept "because learning it is hard and what we know works fine" as a valid argument.