Exactly. It's hard to even really comprehend how deep his influence goes; we're so surrounded by it's hard to even see it sometimes.

Consider that every single person reading these words are doing so using technology he created -- after all, even if you're not on a UNIX derivative you're probably on an OS and web browser written in C.

How much code is written every day in C and its descendants? How much more in languages that themselves are written in C?

dmr is part of an very small group of computer scientists that truly changed the paradigm of computing for everyone everywhere (Turing, von Neumann, Engelbart, ...) As long as there are ones and zeros his name will be remembered.