You would learn way more by asking an LLM how postgres works. Nobody is even reading this Rust code. There are 7000 commits over 2 weeks. What is being learned from that?
You learn that you can build a version of Postgres that passes the tests and improves on these benchmarks in rust. You gain access to a codebase that does it which you can learn a lot from too. Definitely not zero like someone else said
exactly zero knowledge gained. all former expert understanding is buried down in slop so it is inaccessible and will be completely inaccessible once slop-machine stops