At least for me personal open source project[1], it has been >5x boost. In speed, motivation. Operating knowledge level etc. At some places, I even put inline comment, "this generated function is not understood completely" ! Or may be a question on specific syntex (c++20).

[1] https://github.com/ramshankerji/Vishwakarma/

> this generated function is not understood completely

I think this kind of stuff is OK for the most part. I think it's a thrilling part of computer science: building systems so complex they're just on the brink of what can be fully understood by a single person. It's what sets software engineering apart from other engineering fields where it's unacceptable not to fully understand the engineering, say, for factories, buildings, bridges, ships and infrastructure and such.