I understand why managers in big companies would like to think all the past tech capital matters, so legacy matters, and why their customers like to think it makes something better.

I wrote a bit more and erased it.

I don’t think problems solved by desktop operating systems today are qualitatively different from 20 years ago. They are different in structure and direction, which required significant evolution from Windows on Intel, but wouldn’t so much, say, from Amiga were it to remain a living branch.