Obviously, frameworks (and ecosystems…) like Flask, Sinatra, Django and Rails have an advantage in that you can get stuff done today: they do a lot for you. And, for many use-cases, performance will never be a problem.
Saying that, writing HTTP logic in Go has been surprisingly easy, and the small amount of extra boilerplate you have to write (if you’re sans-framework like me) is nice when you realise how darned fast your application is. Being able to deploy a single binary and front-end it with nginx also reduces a ton of complexity.
PS: Once I finish this thing off over the Christmas break, I’m hoping to write up a few articles on the bits-and-pieces that took a bit of time to “get right”. Also have a minimalist (i.e. wraps HandleFunc, not Handler) CSRF package in the works.