Threads may not scale, but thread pools can. And that concept has been in Java and C# for a long time.

I agree with your point about the industry now favouring the event loop model of concurrent programming. I know C# has introduced recently async/await syntax to match the idiomatics of JS (probably to appeal to JS-comfortable devs) ... but the concept of built in event queues is still not supported. (I may be mistaken as I only read a bit about this feature of C# in late 2017)