In your experience, is there a lot of contention over whether a given issue counts as a bug fix or a feature/improvement? In the article, some of the examples were saving people a few clicks in a frequent process, or updating documentation. Naively, I expect that in an environment where bug fixes get infinite priority, those wouldn't count as bugs, so they would potentially stick around forever too.

In my world, improving the UI to save clicks is a new feature, not a bug fix.

Assuming it works as intended.