Yes...all you had to do with iTunes was insert a disc and click a button. After a couple of minutes, the tracks would all be in your library with metadata pulled from the internet. Everyone I knew who had a computer used to duplicate CDs for their car and make mixes.
Nope. I don't have a disk drive on a computer and haven't for several years now. Sure, I could get one, but optical drives have been optional equipment for a while now.
It's optional because you, like many, don't rip/play CDs/DVDs any longer. You'd have one if you had a use for it. I'm guessing you have peripherals attached to one or more of your computers that I consider optional.