It may well have to do with the types of bugs I report. Many are Xcode bugs, and Xcode is one of the most productive bug farms on Earth.

I also submit feature requests and usability issues.

My experience is pure anecdata.

I usually end up closing the reports, after a number of months of them being ignored.

I reported a bug that occurs in a specific configuration of the Music app (trying to use Home Sharing + using bluetooth headphones), never heard anything back. I wonder if it's been fixed in the latest version of the OS, I still haven't upgraded...

RNG coding? I.e. what bugs replaced them...