I like to compare program efficiency to fuel-efficient engines. Most people could get along just fine with a 1950s clunker that gets 10mpg. They might even tell

I like to compare program efficiency to fuel-efficient engines. Most people could get along just fine with a 1950s clunker that gets 10mpg. They might even tell everyone they don't want to upgrade and lose the ability to fix it with nothing more than duct tape and a wrench. There are still clear advantages to all the extra complexity and cost in an efficient engine though.