I wonder: if you showed IBM executives what happens with the PC, would they still greenlight it?
Because they lost control of it pretty quick (the IBM PS/2 was a failed attempt to get control back, and that was only 6 years on) and then from then on they were only one fish in an increasingly bigger pond. And then PC-likes took over the workstation/server markets too, so their minicomputers and mainframes lost a lot too