I'm using a 16-core machine at work, for testing the server apps I'm working on. I found that MS Visual Studio will spawn multiple copies of cl to compile, so it really compiles the large project faster!

A server application made around the concept of multiple worker threads dispatching off incoming events will naturally like more cores.

Also, even if the threads can't really work concurrently but proceed in lock-step, having each on a different core still improves the switching time.

—John