I'll add another data point. We're in the process of moving our entire API stack to Go from Python. First it was in Django, then Falcon, now more & more pieces

I'll add another data point. We're in the process of moving our entire API stack to Go from Python. First it was in Django, then Falcon, now more & more pieces are in pure Go, with a little cgo sprinkled for good measure. Apart from being a language that's easy to pick up if you're familiar with Python, Go is obviously a heckuva lot faster and way easier to deploy. We cut down our EC2 instance usage by 2/3 with more improvements yet to come. One machine alone can handle 1000 API calls / second - and our API calls are performing complex calculations, not just disk I/O. It also allows us to deploy our API within customer's networks if they choose, which we previously accomplished using Virtual Machines - which sucked.