It's an odd dichotomy. However my biggest take away from it is this; if you are thinking about wanting to implement something on your platform of choice but think "Ehh, it's already done over there so nobody will be interested in it" reconsider! There will almost certainly be people in that ecosystem that will appreciate the effort :)

I for one am happy about some of this. I've used the javascript ssh2 library(with a nice async/await wrapper you can find if you look for it) heavily for automation from nodejs. It could have been implemented on libssh2 for my needs, but a goal was for browser support soo.. Who am I to argue :D Perhaps web assembly will make it possible to compile something like libssh2 and consume from JS, but that's a long ways off I bet(being viable to adopt, not get working).