For what it's worth, bugs that Apple engineers file inside of the company often go into the proverbial "Bit Bucket." When I worked at Apple many moons ago I experienced a really horrible bug when performing a system update. I meticulously recorded all of the context and submitted it directly to the owning team. That team proceeded to ignore my bug report for over a year and then kick it back to me with, "It's been a while. Maybe it's fixed. Try going through your repro steps again with the same hardware and let us know what happens."

By then I had swapped out said hardware with more recent stuff I was doing development on.

How many people were impacted by that bug in the meantime? No clue, but I guess it didn't hit Apple's bottom line hard enough to warrant anyone on the owning team even bothering to follow my repro steps themselves.