I don't care as much about LLMs deprecating my accumulated knowledge. After a quarter of a century in the industry I have plenty of stuff in my head of purely sentimental value.

But for me, the real catastrophe is that they took away all my motivation to learn which was the main work driver for me. Anything I can learn now, the models probably already know or will learn soon enough. Steering LLMs isn't anywhere near being a "deep" skill I'm used to having and it too is being eaten by the agentic tools faster than we learn it. The "make it good" button is coming. And I hate it.