I'm hoping ruby gets a bit of a resurgence. It's really not as slow as it used to be (ran some benchmarks recently, and ruby/roda was pretty much on par with node.js/express with multiple processes). The Actor model looks promising too.
I am now seeing a similar lull in the Node space, which I also cover, but it, too, will surely pass through it unscathed.
That said, if Ruby were to get an option to statically compile into a standalone binary, I might check it out again. It really is expressive and joyful.
I don't relish the thought of going back to loops though. Or not having a good REPL.
Deno appeals to me, but isn't very portable yet. Also has a limited node style REPL (can't reload files).
I tried 10, 100 and 1000 concurrent connections.