The whole world is working on this right now, but in some cases it can be extremely money saving. We had a couple of engineers who build a web portal to control some IoT devices because there wasn't one in the market. We've done similar things like that in the past, where we'd buy development from the outside. I can't give you exact costs, but getting it developed is around 5% of the price in AI and HUMAN hours, and then another 10% (bringing it to around 15%) for human hours rewriting it to run securely (and maintainable) in our cloud.
We're working on bringing the last 10% down by giving non-developers various AI skills such as a compliance module that can be pushed to specific Entra groups which will make sure their vibe code madness will stick to external dependencies we've approved. (There are still hard checks later).
For other tasks it's running on guesses, and sometimes you can save help people €1000 a week by teaching them how to use the AI better.