Since I can't peek into the OPs head, I'll have to speculate but here's my take: The power of Mustache (and Handlebars) was that it forced you to write logic-l

Since I can't peek into the OPs head, I'll have to speculate but here's my take: The power of Mustache (and Handlebars) was that it forced you to write logic-less templates. There's just no way to express logic other than checks for existence of values. That means that you have a minimal language that every non-programmer [1] can understand. You can change templates without diving into a language. Walrus changes that to be a pretty much full featured template language with full view logic (hey, look, there's MATH methods in there). It perverts the idea of Mustache. [1] aka designer or template-guru :)