[waffletower]

I am glad that your experience is not the rule, as the OP reveals above. However, I worked for a company about 10 years ago with a fairly prominent app. An update that came out that absolutely destroyed the performance of it. At the precisely the same time, a competitor launched an app which did not have the performance difficulty. It turned out that the developer of the competing app had recently left Apple, and left an undocumented surprise in Apple's video drivers that broke it. It took disassembling the competitors binary to find the undocumented change and repair our application. The developer also taunted our CEO by email. Nice world we live in.

[refulgentis]

Wow. I know the thicket of contracts and such makes it not worth it, but I do wish behavior like this could be called out more directly