My tiny two pet projects I keep developing with LLMs taught me how useful TDD is - I'm not a software engineer so I've been never formally introduced to these, but now I learn the best practices.

So in consequence I have less bugs in this code than what I could achieve myself, and as a second outcome of these is a solid workspace templates that make it faster and easier to get another small thing up to speed, the way that's good and "me". And the very short leash, sandbox and hooks make sure I learn a lot in the process too.