I have not needed multiple agents or using CC over an SSH terminal to run overnight. The main reason is that LLMs are not correct many times. So I still need time to test. Like run the whole app, or check what broke in CI (GitHub Actions), etc. I do not go through code line by line anymore and I organize work with tickets (sometimes they are created with CC too).
Both https://github.com/pixlie/Pixlie and https://github.com/pixlie/SmartCrawler are vibe coded (barely any code that I wrote). With LLMs you can generated code 10x than writing manually. It means you can also get 10x the errors. So the manual checks take some time.
Our existing engineering practices are very helpful when generating code through LLMs and I do not have mental bandwidth to review a mountain of code. I am not sure if we scale out LLMs, it will help in building production quality software. I already see that sometimes CC makes really poor guesses. Imagine many such guesses in parallel, daily.
edit: typo - months/weeks