[michaelt]

Let's say you've got a logging system that sometimes drops lines. And this sometimes makes debugging things hard, because you can't say whether that log line is missing because the code didn't run, or because the log line was lost.

Impact on end users? Nothing measurable. Impact on developers? Frustrating and slows them down, but by how much? It's impossible to say. How often does it happen? Well, difficult to count what isn't there. Would fixing the issue lead to a measurable increase in stories completed per week, or lines of code written, or employee retention? Probably not, as those are very noisy measures.

Nonetheless, that is not a fault I would tolerate or ignore.