14 Sep
2017
14 Sep
'17
12:16 p.m.
Forgive my own stupidity on the subject, but what's the difference between PowerPC as implemented in the PowerMacs of yore, and this "Power9" thing you mention?
IBM has always had a line of beefy POWER processors (some of which implement the PowerPC instruction set, others not (tho it's always very close)), for use in their workstations and mainframes. Those are/were of no use to Apple who needed low-power CPUs for its laptops.
Stefan