Also ex-Apple here. Radar does suffer (to a lesser extent than Jira) from a profound defect, though: Searches are "exact match" for whatever text you put in the title. To find a bug YOU filed, you have to remember the exact words and sequence you used in the title. Did I say "resize window" or "resize a window?"

I filed a bug against Radar for this behavior, and developers from other teams added comments expressing surprise that the tool was crippled in this manner. I think a year later, someone said, "Yep, our team got bit by this today again. We assumed this was fixed years ago."

This fundamental flaw may explain why some widely-encountered bugs in Apple products don't get fixed, or at least fixed in a timely manner. A dozen Radars could be filed for the same defect, but if they aren't phrased the same way you'll never find all the dupes. So dumb.

Still... I could construct queries based on status and product more easily in Radar than in Jira.