Meh, JSP and PHP do this already. JSP is of course <%… %>. ColdFusion does it all the time. It’s easier on the eye, especially with editor support, than having to scan for all those ^ characters.
Anyway, my original comment was a take on “PHP but for Go”, and only half serious. I don’t see myself using the product discussed here. I hear the people who say “I disable JavaScript” but frankly I always write my apps so that the frontend part communicates with the backend via JSON API. I’m not a frontend dev…