Wait so the engineers doing novel work are ousted; you fire the engineer that had the skill set to produce the work in the first place? Surely this is creating a Stasi-like neighbour snitching environment with chilling effect where the better you do the faster you become a target for replacement by engineer's incentivized to win points by replacing you. Even being very charitable where the scenario is the code was so poor that the code the employee is working on is so entrenched in domain knowledge they've become a huge bus factor, an LLM is going to make that kind of code worse. I'm struggling to imagine the subset of people this replaces that is not a long term detriment to everyone working there. Those people became "key personnel" for a reason no?