>>7
Most browsers today even detect and hide/correct this because it should not be your job as the end user to unfuck the protocol end of URLs when you are implicitly only much interested in HTTP.

Nonetheless, a lot of the Internet runs on pure inertia and ad-hoc trying shit out. That many Internet "standards" are technically just IETF RFCs is not a mistake. "Some people started singing it, not knowing what it was...."