I feel their main mistake was lack of choice. The second biggest mistake was pushing too many changes at a time. For choice, they finally relented with windows

I feel their main mistake was lack of choice. The second biggest mistake was pushing too many changes at a time. For choice, they finally relented with windows 8.1 and allowed people to boot to desktop directly rather than the start screen. Windows 10 took off the start screen completely. Choice matters. I liked the start screen but the horizontal scrolling killed it. Like pouring salt in Tea. Too many changes. Facebook's learned this lesson well. They no longer do large overhauls. Small changes at a time and in a few months, it's a whole different interface. Only infrequent users would notice. That's what they are doing with Windows 10 - many small interface changes. The little changes are mainly minor inconveniences. One last thing. When they released windows 8 - hardware support was almost non existent. Touch screen PC from that era really sucked. Now with detachable screens, Win 8 style pc interactions might be cool.