Anecdotally, I have seen some engineers totally give in and start using LLMs to do 90%+ of their work, and the atrophy in their critical thinking skills is readily apparent. It's both shocking and entirely predictable.
I'm extremely worried about how this phenomenon is going to affect junior engineers and folks getting into programming from here on out. It's not hard to imagine an entire generation of “engineers” that can't program their way out of a paper bag without assistance from an LLM.