I have just stepped down from a CTO job where I built a FinTech's stack from the ground up. I leveraged a Claude Max plan for about 8 months and I can say with absolute certainty I would not have been as productive without it. I have barely written any code by hand during that time, but I did read almost every single line of code produced. My role was much more that of an "editor", as another article posted here mentioned. There is no doubt in my mind that you can be very highly productive with AI, it's just not the magical silver bullet some people market it as. I have a lot of notes describing the process that I'm considering publishing.

Just yesterday I was interviewing for a very interesting job and I completely flunked the coding question in an unacceptable way for my level of experience. The question was easy, I just couldn't get past some syntactic issues. For 8 months, Claude wrote all of my Python classes and Pydantic types. Now I had to write a dataclass, and because I always just resorted to standard classes before the advent of LLMs, I stumbled. And froze. And panicked. And that was it. Of course you could say I should have just scrapped the dataclass and written it as a simple class. The point is I felt very, very stupid. LLMs suddenly felt like a huge disadvantage.

All this to say I disagree with LLMs "rotting" my brain. Quite the opposite, I know that it's possible to use LLMs to be efficient and correct. It's more the actual mechanical act of writing that gets rusty.