I pretty much all of these. One thing I wanted to add is decorators. There is code you might have easy access to edit to add print statements. I don’t love the spring boot docs and reading the code isn’t as useful as stepping through your specific autowired code tree. There’s definitely use cases but 95% of the time prints will get you there. Imo you should learn it because it will save you a bunch of time and headache when you need it.