[marginalia_nu]

The less resources you use from your system, the more things you can do with your system.

[spicybright]

Only matters if you're actually using those extra cycles or not. The majority of web servers hover at <10% CPU just waiting for connections.

[munk-a]

I don't know if that's really true - if you're renting the server from a cloud provider chances are you can bump down the instance size if you don't need the extra processing capacity... and if it's a server you manually maintain I think lighter usage generally decreases part attrition, though the other factors in that are quite complex.