It only works if the users upgrade always to every new release - which is not the case with the kernel, even the 6-montly distribution releases are bound to miss at least one of the 3-montly kernel releases, not to mention the Debian stable users...
Posted Oct 31, 2009 19:57 UTC (Sat) by davecb (subscriber, #1574)
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Not necessarily: unwillingness to upgrade and the freedom to not upgrade is why the time periods are so long. In the commercial world, the rule of thumb is that the slower users upgrade every three years, because the hardware turns over in roughly that period.
Instead of the months I usually work with, large-systems and linkers folks tend to support old versions of things for multiple hardware cycles, with complaints in the current, forced user intervention in the second and obsolescence in the third if no-one or note enough people scream bloody murder in the first two.