If you really, really wanted to stick to Ruby-like syntax for whatever reason, and you wanted to do "reactive programming", couldn't you just use Elixir? A VM

If you really, really wanted to stick to Ruby-like syntax for whatever reason, and you wanted to do "reactive programming", couldn't you just use Elixir? A VM with soft-realtime semantics, OTP patterns as architectural building blocks, and an almost-too-easy path toward writing distributed applications.