It's crazy to me to see what still feel like new developments (come on, it was just 2017!) making their way into mainstream general purpose undergraduate textbo

It's crazy to me to see what still feel like new developments (come on, it was just 2017!) making their way into mainstream general purpose undergraduate textbooks like AIMA. It's this what getting old feels like? :-\ I start to understand what you always hear from older ICs about having to work to keep up, or else every undergrad coming out will know things you don't.