Our company has clients that have different scalability needs. Whenever we were faced with a bottleneck on one of our servers, my boss had a saying: "Hardware

Our company has clients that have different scalability needs. Whenever we were faced with a bottleneck on one of our servers, my boss had a saying: "Hardware is always cheaper than software." I thought he was insane. But It's funny, it was almost always the case. Throwing another server at the problem turned out to be way more cost-effective than having to go back to engineering, spend 40 hours optimizing and another 40 doing regression testing.