I'm not sure having to learn how some kid decided to design a new package manager is what we should be re/learning. If anything it might kill your career as you keep learning basic libraries and never understand the underlyings.

Learning fundamentals and mastering every shiny, new frameworks that will be replaced in few months (years max) are totally different things.

Thank you... 42 here (at it about 20 years now), and I can't imagine where my career would be today if I stood still at any point. Even in the JS and front-end space alone there's a lot to learn. There's adjacent tech too (various db's, cloud providers, ci/cd, docker, etc). It hasn't stopped or stood still and never will.