Yep. Especially for tests with mock data covering all sorts of extreme edge cases.

Don't use AI for that, it doesn't know what your real data looks like.

lol. okay. neither do you.

Majority of data in typical message-passing plumbing code are a combination of opaque IDs, nominal strings, few enums, and floats. It's mostly OK for these cases, I have found. Esp. in typed languages.