> Spring is a good example too. I used it quite a bit in my junior years and felt like I would never come to master a framework that is so broad (and that felt

> Spring is a good example too. I used it quite a bit in my junior years and felt like I would never come to master a framework that is so broad (and that felt over-engineered). I still feel this way. I work on all kinds of weird / cool technologies on the side and I can’t imagine ever coming to call myself in expert on anything because I only use a subset to solve a problem.