Before the Internet arrived, very few people had a big need for it. It makes some things marginally harder, and it's more work to implement, so it makes sense t

Before the Internet arrived, very few people had a big need for it. It makes some things marginally harder, and it's more work to implement, so it makes sense that it got left off. By the time the Internet generally arrived, and people generally realized what the Internet meant, we had accumulated enough backwards compatibility burden that sweeping architectural changes were difficult.