Note the Go implementation is effectively halted due to frustrations largely stemming from questionable choices in message layout and incompatibilities arising

Note the Go implementation is effectively halted due to frustrations largely stemming from questionable choices in message layout and incompatibilities arising from JS (un)marshalling oddities that are largely hidden by the single implementation (it's easy to be compatible with yourself). I would not classify SSB as "simple" to implement in anything but JS.