Well, as a hardware tech for 40+ years, I hate to see cheap, generic, underpowered power supplies cause the entire category of "hardware" to get the blame where those PSUs should never have been used in the first place.
The choice of a PSU is often, solely a marketing/budget decision - made by an uninformed human making bad decisions. So, with the right hardware for the job, if properly cooled (again, a human responsibility) and kept clean of heat trapping dust (again - the human), instability due to hardware should not be an issue.
Of course, if, if, if. We can all come up with valid "what ifs". The reality is, Apple's proprietary control over its hardware means it can ensure good quality control, which history proves, if done right, improves reliability. And no doubt, Apple computers, desktop and notebooks, consistently are top rated (in terms of hardware reliability) so they must be doing something right.
PCs can be (and are) made by just about anybody who can twist a #2 Phillips screwdriver. And sadly, the PSU is a common place naive (or the "ethically challenged") cut corners to save a few dollars. That is usually a mistake.
Is it fair to blame the hardware when it was the wrong hardware for the job?