I love watching talks from some of the originators (Kirk McKusick, Rob Pike, Brian Kernighan etc.. ) of the systems that eventually brought us Unix and its derivatives . You get insights of history that isn't found easily in print, for example , Kirk mentioned once (in a previous video) that during the design phase of TCP/IP Ipv4 could have been a 48bit addressing scheme but they finally decided to go with the current 32 bit one because there's no way we can run out of 2^32 addresses ;) ., and Rob also once mentioned that Bell labs had a better layer 2 implementation that could have easily displaced Ethernet, overall good talk.
