"At one time, IBM's multiplatform strategy was considered a disadvantage when compared with other systems companies with less 'legacy' baggage. But as HP and Oracle/Sun increasingly lead with the x86 option, Big Blue is looking more differentiated – it can offer 'fit for purpose' systems from x86/distributed through to proprietary Unix, mainframes or integrated systems. Of course, updating the mainframe is more about retaining its current user base then acquiring new customers, but for the first time in many years new mainframe users are emerging. Given the right use cases, mainframes can work out to be cheaper than distributed systems. IBM claims the average cost of a distributed system is 2.2 times greater than System z – mainframe hardware costs are higher, but the software costs (excluding migration) are much lower."
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