There is an understandable amount of cynicism among the AS/400 faithful that IBM has neglected the OS/400 operating system, stealing all the best goodies from OS/400 and weaving them into AIX and then not adding some nifty features, such as live partition mobility for PowerVM, to i/OS, the modern instantiation of OS/400. Moreover, i/OS releases are anything but regular and Big Blue doesn't roll up dot releases like other operating system makers do.