I don't know how GP feels about this, but web development is almost commoditized at this point. The barrier to entry is pretty low, and supply has grown sharply

I don't know how GP feels about this, but web development is almost commoditized at this point. The barrier to entry is pretty low, and supply has grown sharply as more people learn how to code. I think GP means something less specific, like "become an expert in distributed database systems" or "learn to develop infrastructure for distributed machine learning." Those problems are complementary to some of the biggest areas in tech now (machine learning, distributed computing) and will not go away for a long time.