It seems to me like we have the answers to all those questions.
- Do we know which projects people work on?
It's pretty easy to discover that OP works on https://livox.com.br/en/, a tool that uses AI to let people with disabilities speak. That sounds like a reasonable project to me.
- Do we know which codebases (greenfield, mature, proprietary etc.) people work on
The e2e tests took 2 hours to run and the website quotes ~40M words. That is not greenfield.
- Do we know the level of expertise the people have?
It seems like they work on nontrivial production apps.
- How much additional work did they have reviewing, fixing, deploying, finishing etc.?
There's a handy list to check against the article here: https://dmitriid.com/everything-around-llms-is-still-magical... starting at "For every description of how LLMs work or don't work we know only some, but not all of the following"