Yes, I did read that but it does not prove you do not have a hardware problem. It may be a coincidence or it may be that iOS 10 triggered a hardware problem that already existed but was not triggered by iOS 9.3.5. Or just the task of updating, which takes a lot of processing power, revealed the issue.
Could you define "incredible amount of people"? As you already said there are about a dozen people posting in this thread.
There are other threads in ASC about this but they all turned out to be related to the battery in the iPhone. You need to forget about your self-diagnosis that it is not hardware and contact Apple.