First of all, IBM never sold 'cheap' microcomputers :bigsmile:, secondly, there is a big difference between going into another market and tweaking an existing OS in a way that has received much negative mention.
I was around in the eighties, but I do not recall any negative attitude towards IBM going into the client computer market. However, I do recall much negative mention regarding their arrogance and ignorance towards customers in the server market. As we know, they got hit quite badly some years later when Microsoft came along with their NT4 and the rest is history. Now, that would qualify as a comparison to what may happen to Microsoft's client OS unless they start listening to the users and rather continue their travel on 'ignorance avenue'. The sheer amount of 3rd-party tweaks and tools, both legal and well in the grey at least should tell Microsoft that there are a lot of users who disagree with their present direction.
What I notice is that there are several Linux distros being made with the more casual user in mind and given a little time, they may become real competition to Windows which really is the oddball compared to the rest, even MAC (that's just BSD and so sort of Linux as well).