I'm not sure how you define skill acquisition, it's reading documentation and doing the skill, yes? The AI landscape shifts rather quickly still, and a new LLM + harness has a different set of functionality, but more importantly different fuzzy failure cases Things a model is particular good at, things that work better if you combine certain systems. All of it is documented, but also fast moving and new things are discovered frequently. In comparison, Vim has been around for decades.

And vum is absolutely harder to use than notepad. Otherwise it's like saying that rocket science isn't hard because you just have to read the documentation to know how to engineer a rocket.