This is my biggest issue with working at FAANG (been at 2). Lots of people just don't give a shit. To paraphrase the Silicon Valley show: "you got your RSUs now fuck off for 4 years". I can't fault people for making the best financial decision for them, but for crying out loud, give a shit about the code. Write the unit test. Write the docs to explain the architecture. Refactor the code while you're editing that file. Think about class and method names. Give a shit.