I have such a long history of thinking of Microsoft as the Big Bad in tech, that it's funny to think of them as the young upstart that's just coming into their own and standing up to the big guys for the first time. If it was early enough for folks to be arguing about what keys to use for functions, it must have been 1985, which means Microsoft was just coming to the end of their time needing to satisfy IBM in order to survive/thrive.

They still depended on IBM to some degree. If IBM stopped shipping Microsoft products on their PCs, it would hurt Microsoft quite a lot. But, clones had just begun to break out. Compaq and a few dozen other clone makers were exploding in popularity. I imagine Gates must have seen their orders from clone makers growing exponentially, and much faster than sales to IBM, and realized they didn't really have to kowtow to IBM, anymore.

A real shame about OS/2, though.