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A comment on Next Week's Bloodbath At IBM Won't Fix The Real Problem. Parent comment

Re:Next Week's Bloodbath At IBM Won't Fix The Real Problem by graycat on Sunday January 25, 2015 @10:42PM (#8945443)
Long one of the main reasons for IBM mainframes was the bet your business software that wouldn't run anywhere else and that would be too expensive to rewrite to run somewhere else.

Also, there is a remark that in major parts of the financial industry, running an IBM mainframe is nearly a necessary condition for compliance.

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Re:Next Week's Bloodbath At IBM Won't Fix The Real Problem by jussij on Monday January 26, 2015 @01:03AM (#8945717)
> would be too expensive to rewrite to run somewhere else.

I'm don't doubt that is a major factor. Add to that the major risk that what every new system you move to might actually fail to work or end up costing more.

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