> Learning new CS concepts A key reason is that so many CS concepts are already well packaged in very nice libraries or frameworks. And unfortunately many peo

> Learning new CS concepts A key reason is that so many CS concepts are already well packaged in very nice libraries or frameworks. And unfortunately many people do not have to use very advanced CS concepts. Look at the so-called top 10 algorithms or data structures for <your favorite area>, how many of them are invented recently, and how many of them do not have an amazing library of production quality? Note this does not mean that the CS field is not advancing. It's just that we have yet to find another hyper-growth area that demands novel algorithm, except probably the AI infra - except that only very few people get to work on that area.