They were a lot easier to grasp too. Not in small part because they tended to be cleartext, and could therefore be easily examined. While part of me kind of misses those innocent times, most of me is pretty glad we’re phasing that stuff out.
My favourite part though: RFCs. A term that nowadays means different things to different people or in different contexts. But to anyone who was online and took an interest in Internet technology back in the day it only means one thing: specifications for open protocols designed to keep the Internet interoperable. What happened to those?