Yes of course, the spec can be implemented in any language. I've used Go mainly for personal preferences and portability with only one binary to scp on the server. I'm going to try to propose other implementations as you suggest.

Go totally slipped my mind. It's also a good choice for the design I outlined.

You're absolutely right. The fun thing is that I googled it and saw a couple of articles doing the comparison between both. And to be honest, that's why I used the "on-prem" shortcut most of the time.