Why have one JVM per application?

Question

I read that each application runs in its own JVM. Why is it so ? Why don\'t they make one JVM run 2 or more apps ?

I read a SO post, but could not get the answers th

Answer 1

For isolating execution contexts.

If one of the processes hangs, or fails, or it's security is compromised, the others don't get affected.

I think having separate runtimes also helps GC, because it has less references to handle than if it was altogether.

Besides, why would you run them all in one JVM?