Yet it didn't take 1000 of them to fix it on other OSes. Why are we even debating 1000 devs anyway? That is hardly the point and throwing more and more bodies at a programming problem is hardly ever a solution, nor one I proposed in my original comment.

It's ultimately a matter of talent, resources, and proper management. Which is hardly an insurmountable problem for a major tech company which decades of experience solving world-is-ending bugs.