Not having to worry about closing tags can be solved in numerous other ways without having to invent a new language. And strictly speaking, Haml doesn't actuall

Not having to worry about closing tags can be solved in numerous other ways without having to invent a new language. And strictly speaking, Haml doesn't actually remove closing tags - it replaces them with whitespace defined structure. This introduces new classes of problems. Like having to deal with when it is unclear when the whitespace is part of the structure versus when it is part of the content. There is a reason why the Haml reference has a section on this. Then there's all the other syntax that needs to be crammed in to make the language do what you want. HTML doesn't have lots of special characters strewn about the place that have meaning, but Haml does. You now have to understand HTML, Haml and how Haml is turned into HTML. That's a lot more complexity than sticking close to HTML. It seems like a lot of unnecessary work to use Haml (and impose it on other people through code) if your reasons for using Haml are purely superficial.