Well Brad, that's very dependent on what exactly the service is. Moreover oftentimes low CPU utilization is actually a limitation of the implementation on a slo

Well Brad, that's very dependent on what exactly the service is. Moreover oftentimes low CPU utilization is actually a limitation of the implementation on a slow language (eg; Python technically does have async webservers but adds a lot of idle overhead). Indeed, there are many benefits these more performant languages have over Python aside from raw single-core performance. For starters, more efficient concurrency and parallelism can help reduce average latency when combined with a quality async webserver. Then there's gains due to shared memory across threads. So in many cases-- absolutely, you can only need 1 server vs. 10 when you migrate. It's thus not fair to say that these gains are "very rare".