Not publicly yet, but I work on a programming language, compiler, and runtime that achieves magical (to me) things in a niche field. I would never have attempted something at this scale otherwise, so it's a very 0-to-1 experience subjectively.

That matches my experience. At least on the solo front, there were so many topics I wasn't an expert on, that limited what I could build. Now with AI assistance, the sky is the limit. I don't need to be an expert in frontend, backend, I can just build on my personal expertise in a functional domain, and leverage AI to fill in the gaps. I believe many people will benefit from being to build exactly what they want, without gatekeepers or investment.