s390x is another "live" CPU architecture, but it's a bit of a special case -- the niche of "IBM mainframe" is unlikely to go away any time soon, but it's not ex

s390x is another "live" CPU architecture, but it's a bit of a special case -- the niche of "IBM mainframe" is unlikely to go away any time soon, but it's not expanding either and the architecture isn't about to leave that niche...