[pclmulqdq]

This is absolutely a US thing, but even so, if you're a nice person, you can get away with a lot more than if you're not. I have heard before that you can be a successful engineer if you are two of brilliant, affable, and diligent (pick any two). Just being nice goes a long way.

However, note that being a nice person combined with knowing your way around legacy codebases is a form of leadership in itself. Not one that we reward well, sadly, but if your colleagues have a chat with you (which they like to do anyway) and then save hours of work, that's leadership.