Drew,
You took a sentence out of a paragraph and addressed it - the paragraph is the whole point, so... I think you should read the whole thing and respond to the whole thing. It's why I posted the whole thing.
People SHOULD be cautious about doing something as complex and risky as changing their entire underlying OS - not to have a backup in place and all your other ducks in a row (your installation media, product keys, and all your important files - like documents,
emails, pictures, music, etc.) like you should ALWAYS have (but an extra one just to be current right before you undertake the process) would be FOOLISH at best.
While there *are* people not having problems - there are likely just as many having problems. It was inevitable: the undertaking to smoothly upgrade millions of possible combinations of hardware and software ... BIG. A computer is not a toaster, it is
a multi-tasking, multi-faceted and complicated device.
Don't fall into a comfortable anecdotal fallacy...