I think that arguing that Microsoft's control of Windows constitutes a form of colonialism was really a rather cynical attempt on the part of Richard Stallman to take a common class of Western leftist political argumentation, and leverage it towards the thing he actually cares about, which is free software. For a long time, it's been common for Western (or Westernized) leftists to make arguments of the form that something that the arguer doesn't like and that has some connection to the Western world constitutes a type of colonialism of the non-Western world; and I think Stallman was half-heartedly aping that tradition when he happened to be making his free software case in India, a non-Western country that has a strong cultural memory of breaking free from British colonial rule.

There are definitely still people who leverage those kinds of general colonialist arguments, including perhaps for the cause of free software; there's also many people who are actively hostile to general colonialist arguments, probably more now than there were in the 2000s. But it was a bad argument for Linux then and a bad argument now.