I operate on a "no known bugs" basis with quite a bit of effort invested to try to find new, unknown bugs.

The idea that every crash isn't acted on is kind of a crazy one, to me. Not every crash is actually actionable in e.g. a mobile app, but every one should at least get an eyeball in my opinion.

This, to me anyway, is the bare minimum of "caring about software quality". If you do this regularly you'll have very solid code, and it's interesting that I have the perception at least that Guild Wars was a quality product.

There's another layer, where you do that for subthreshold issues like UI inconvenience, etc, but that's bonus, I think.