I'm a fan of the JVM, but it doesn't remove the need to be prepared to scale up by adding more machines. That said, it's great at concurrency, so it's easier to

I'm a fan of the JVM, but it doesn't remove the need to be prepared to scale up by adding more machines. That said, it's great at concurrency, so it's easier to harness the full capability of a machine than with other platforms. Even if I didn't need multiple machines for throughput I'd probably still want them for redundancy (redundancy of machine hardware as well as redundancy across availability zones). (Note: didn't vote on your post)