Former AMD employee here (2007-2012) AMD 'dropped the ball' BADLY when (2012) then-VP Ben Bar-Haim decided to do a software purge, and focused on retaining the over-bureaucratic folks of ATI/Markham. Net result: NVidia was (and did) pick up a lot of very smart researchers and developers from AMD (I know of a couple whom were thoroughly disgusted with AMD management at that time) He also trashed a lot of good and usef…
Instead AMD bought ATI which if I remember was barely hanging on. Not saying it was a bad purchase, just interesting that a bet on ATI (always had buggy drivers in my experience) which hadn't really demonstrated success ... how decisions ripple for a while.