Understanding how to build an agent and how Model Context Protocol works is going to be, by my best guess, the new "what is a linked list and how do you reverse a linked list" interview question in the future. Sure, new abstractions are going to come along, which means that you could perhaps be blissfully unaware about how to do that because there's a higher order function to achieve such things. But for now, we are at the level of C and, like C, it's essential to know what those are and how to work with them.