On a service that has been up for almost 20 years, same code base, thousands of daily users, the first server was constantly on 100% CPU. The second server, averaged around 10% CPU with lots of spikes. The third server, now average below 1% CPU usage. Next time I need to upgrade I will probably get a "NUC", or a smarphone, or something even smaller. But it's not only CPU's that has gotten better. The first server also maxed out the bandwidth! And now, although with less users, the bandwidth usage is less then 1% Started out on 0.5Mbit DSL, and it's now on a Gbit fiber.