Comment by johnnyanmac

Most of us work in decade+ legacy code made from a lot of people who are no longer at the company. So most of the code is brittle by default. That's simply the trend that emerged from a workforce that stopped incetivizing retention.

As such, I'd argue that 80+% of your problem solving for the first few years (AKA the only years before you hop or get laid off) is in fact asking other people what the quirks of the code-base are. Maybe that is bad, but it doesn't seem like the retention culture is shifting anytime soon.