When you're actually using the tool you're building, it switches to default-converging.

Instead of pushing in functionality you think will be useful into it, you pull in functionality you need.

This happens as long as you are able to modify the tool, and your use is load-bearing.

When you run into something that doesn't work the way you want, instead of giving up, you dig in.

If you believe what you're building will be valuable in general, then you'll be happy to over-invest a bit to solve your problem, and create downstream value too.