I was struck by this while reading an old 1983, ACM (Association of Computing Computing Machinery) article about Centralized versus Decentralized Computing. This has been an ongoing debate during all of my 30+ years of data processing.
On to the scene comes the new IBM z/OS 64-bit operating system and a means of portioning "virtual servers" within one box. Basically it sounds like the "old mainframe" unix style. So again we come back to Centralized VS Decentralized. I guess this is just the musings of someone who's been in the business a long time, and have seen things come full circles many times.