This article immediately reminded me of a video I saw a while ago.[1] The long and short - MS basically laid off the staff that tested Windows, and much of it is automated nowadays (I bet the MBA educated executive at MS who was responsible for that got PHAT bonus, at the expense of Windows customers and laid off testing staff, of course). Seems like it happened in 2015, which is why it seems that windows updates hav…
AFAIU Windows updates roll out to regular users first, and to corporate customers much later (perhaps depending on how the admin configures it). In a way, regular users are test monkeys. But this makes it less likely to brick corporations. (Of course this can still happen to due unique corp settings).