I put like 400 hours into it by the way.
Maybe we were just 6 months too early to start?
Best of luck finishing it up. You can do it.
We don't even build guardrails that keep humans who test stuff as they go from introducing subtle bugs by accident; removing more eyes from that introduces new risks (although LLMs are also better at avoiding certain types of bugs, like copypasta shit).
"Test your tests" gets very difficult as a product evolves and increases in complexity. Few contracts (whether unit test level or "automation clicking on the element on the page") level are static enough to avoid needing to rework the tests, which means reworking the testing of the tests, ...
I think we'll find out just how low the general public's tolerance for bugs and regressions is.
But I am not so pessimistic. I do think it will be possible, because it is more fun to test your tests now than in the pre-LLM era. You just need a little bit of knowledge and patience, and the LLM absorbs most of the psychic pain.
If programmers get accustomed to doing their tests of tests, software might actually get better.