When IBM moved their mainframe systems (the S/360 family that is today called System Z) from BiCMOS to mainstream CMOS in 1994, the net result was a severe loss in clock frequency and thus single-processor performance. Still, the move had to be done, since CMOS would scale much better into the future. As a result, IBM introduced additional parallelism to the system in order to maintain performance parity. Parallelism as a patch, essentially.
Matt’s Today in History: System/360
I am a regular listener to the Matt’s Today in History podcast. When Matt asked for contributions for this spring (in order to meet a goal of 500 podcasts before Summer) I did give some thought to what I could contribute. Looking over some books, I found one suitable Spring date: the launch of the IBM System/360 back in 1964. The resulting podcast is now live at Matt’s Today in History.
Please be kind to any mistakes… I am trying to paint a broad picture for a computer-history-ignorant audience here.