WinX. If you are asking what was the catalyst. Their seizmic change from attempting to listen to what customers want. To Cloud and AI first to exploit the customer. Security, and privacy means little to nothing.
Every product team no longer targets what the customers want, none. Everything is to extend AI and rent charging at all cost. A small team infiltrated Microsoft in early 2000’s and warped what success looks like within the company to profit, at any cost.