You can't imagine how I hate these discussion: they make me feel old. Old, because I so vividly remember the Big News of Java 1.2 switching from green threads to native.

I'm actually not that old, I didn't use java at the time, but those news were my introduction to the term "thread" so they kind of stayed with me. A tiny part of my brain still files "threads" under "the thing java once didn't use natively" and wow, that part feels old now.