Dan Luu

While being an extremely broad generalist can work, it’s gotten much harder to “know a bit of everything” and be effective because there’s more of everything over time (in terms of both breadth and depth).

…If you watch an anime or a TV series “about” fighting, people often improve by increasing the number of techniques they know because that’s an easy thing to depict but, in real life, getting better at techniques you already know is often more effective than having a portfolio of hundreds of "moves". I’ve personally found this to be true in a variety of disciplines.