I came across some Emacs elisp code I'd written about 25 years ago, and it looked pretty useful. Emacs didn't like it. I researched the functions and variables and they apparently had been rejiggered about 5 years later. I said to myself, Self, sez I, this could be an interesting AI test. I could probably make this do what I want in a few minutes now if I did it from scratch, but that wouldn't help me understand why it was written that way 25 years ago.
So I asked Grok. I was pleasantly surprised to find it understood 25 year old elisp code just fine, explained when and how they had been rejiggered, and rewrite it for the current standards. That was more than I had expected and well worth the time invested.
One other time Grok surprised me was asking how much of FDR's New Deal legislation would have passed if it had required 2/3 passage instead of just 1/2. Not only did it name the legislation which would not have passed, it also named all the legislation which had passed by voice vote and there was no way to know if 2/3 had voted for it. The couple of bills I checked did match and were not hallucinations. The voice vote business was a nice surprise.
I program now for fun, not professionally. The idea of "offshoring" the fun to AI doesn't interest me. But trying to find 25-year-old documentation and when it changed doesn't sound like fun, and I'm glad to know I can offshore at least some of the dreary parts.