Re: Where did it all go wrong?
It all went wrong the day MS stopped having 'Making a [decent] operating system (and other bits of software)' as its priority, and changed its priority to 'Making lots of money for its shareholders'. The moment that flip occurs in any business is the moment what they 'do' simply becomes the means to a mercenary end.
MS could quite easily shift to making electric cars/underwear/sugar saturated fizzy drinks/vegan burgers/... and it wouldn't make any difference because MS primary business is, and has been for many years, extracting the maximum amount of money it can get away with while minimising expenses - like most of the world's corporates. Developing a [decent] OS crashed down the priority list years ago.