Being able to use the same template syntax on front and back, would be amazing!
I'm going to reiterate what I said the last time this thread popped up: "literally anything but jade."
Personally, I dislike jade firstly because it's syntax is (in my opinion) dog ugly, secondly because no editor I could find would actually syntax highlight it and thirdly because it feels like I'm just writing html without the <>s.
Yes, but we don't all have Textmate...
Textmate , Sublime, Cloud 9, Brackets, IntelliJ, RubyMine, PhpStorm, PyCharm, Eclips, Komodo. Everything supports jade. And even if it didn't in the past, it's a tabbed language, you don't even need syntax highlighting to easily scan it. Nor do you need a linter to ensure your writing valid html. It is visually intuitive without highlighting.
And I get that it's an opinion, but "ugly" ? Compared to what? Calling it ugly is like calling out anyone of the 7 dwarves for being short.