What critical tiny tool you can vibe code easily but somehow still don't?

I am pretty sure it's not just me, but this feels weird.

We can literally vibe code an app in a few hours now. Yet I still keep Googling the same tiny utilities over and over.

Not SaaS products. Just simple tools. Things like Markdown editor, JSON visualize, color palette extractor, text formatter. None of these are complicated anymore. Most could probably be built in one evening.

That bring me to the point that there is a threshold after which you vibe code. This threshold will be a range, too simple you don;t build, too complex you don't.

What's that threshold for you? Also, what's that one tool you still search for?