One of Java's the ecosystem fundamental platforms is that it's multi-threading. It's gone through too many models. And since Java has a metric ton of blog post

One of Java's the ecosystem fundamental platforms is that it's multi-threading. It's gone through too many models. And since Java has a metric ton of blog posts from the 2000s and 2010s, a lot of search engines lead you to older models.java itself has gone from green threads to OS threads and back to green threads now.