Compared to any language that has threads, workers are a usability nightmare and come with a million caveats.

(For example they have major limitations in Electron, which is one place where having threads would be very convenient. The current best practice is to spin up an entire new hidden browserwindow instead which is frankly insane.)

We offload anything that would need a thread to another process on the JVM for electron. I know a few other projects offload to a GO process.

workers are clunky compared to how parallel/async computing is implemented in Clojure, for example.

static typing seems to be on the horizon (facepalm)

Well yeah, Microsoft developed TypeScript to resemble C#'s type system so naturally it will look a bit like Java? TS is far from being the de-facto standard though (maybe because it's centred around OOP?)