

Let me repeat, a big part of the success of windows is due to piracy. In developing countries, poor people rely on it. Eventually they may become educated and well, they know how to use windows.
If windows/office becomes annoying with the ads then people will look for alternatives.

In that thought experiment there are more scenarios. Remembering that stepping on a butterfly can change… This is, small input changes can have big repercussions down the line.
You cannot assume what Linux would be in that scenario.
Who knows if it would have been colored by a main corporation.
Capitalism would have found a way to leverage it and new computers would be sold.