If one engineer taking PTO can stall shipping, your problem is not staffing. Your system is carrying critical context in people instead of in the work.
For 23 years I've watched developers copy code they didn't understand. First from Stack Overflow, now from AI. The pattern never changed. We just changed who we blame.
I was watching the head of architecture demo his team's AI setup when I realized we'd been solving the wrong problem. The style guide wasn't missing. It was invisible.
For the first month I treated Copilot like a junior engineer with ambition and no guardrails. It created variables named R and T, broke tests it didn't care about, and left me cleaning up for two hours.
A senior engineer posted on Reddit recently about how it's almost like he's in grief. More than a decade of craft. The things he loved. And now it's all changing.