Dragsters

You don't need a 2000 horsepower dragster to get groceries.

You don't need a Mac Pro to check Facebook.

You don't need the fanciest parallel algorithm to process a relatively small amount of data. Learned that one today.

Many problems get hard at scale, but many times things simply don't get there. Don't bother building(and maintaining) a dragster, when a simple one-speed bicycle will do.