I am a solo developer. I write most of my code by hand. I use LLMs to help me do research and to help find stuff in documentation. I also use it to do come reviews since I don't have anyone else to review the code. I do get a lot of value out of the code review. It often finds little things I missed or will tell me if my code sucks.
Really for what I am doing writing the code is never the bottleneck. I spend little of my time actually writing code. Where I spend most of my time on the design and requirements.