We recently replaced the front-end application servers that support our Web SMS and SMS API services as part of a longer term infrastructure refresh programme. We've essentially replaced them with their current equivalents and the difference is astounding.
Where our last servers were averaging 70-90% CPU utlisation, these new ones rarely get above 20%. In additon, they draw less power than the servers they've replaced. handy given Power is the Currency for datacentre charging these days.
Moore's law tell's us that processing power doubles every 2 years. It seems he had a point.