"Invest 80% of your learning time in fundamentals. Leave 20% for frameworks, libraries and tools."I think it's good to step back and be mindful about where you're putting your energy. This idea reminds me of Stewart Brand's pace layering metaphor. We need all the layers for a healthy ecosystem. This article is a good reminder that we shouldn't focus so intently on the twists and turns of the outside layer that we exclude the others.