Great points. I'd like to add that IBM's latest mainframe is the z14 (z14 seems to be the name of both the CPU and the mainframe) and it's pretty interesting:

Great points. I'd like to add that IBM's latest mainframe is the z14 (z14 seems to be the name of both the CPU and the mainframe) and it's pretty interesting: https://fuse.wikichip.org/news/941/isscc-2018-the-ibm-z14-microprocessor-and-system-control-design/ https://fuse.wikichip.org/news/941/isscc-2018-the-ibm-z14-mi... (No affiliation with IBM)