second-system effect: n. (sometimes, more euphoniously,
`second-system syndrome') When one is designing the successor to a
relatively small, elegant, and successful system, there is a
tendency to become grandiose in one's success and design an
elephantine feature-laden monstrosity. The term was first used by
Fred Brooks in his classic "The Mythical Man-Month: Essays on
Software Engineering" (Addison-Wesley, 1975; ISBN 0-201-00650-2).
It described the jump from a set of nice, simple operating systems
on the IBM 70xx series to OS/360 on the 360 series. A similar
effect can also happen in an evolving system; see Brooks's Law,
creeping elegance, creeping featurism. See also Multics,
OS/2, X, software bloat.
This version of the jargon lexicon has been described (with
altogether too much truth for comfort) as an example of
second-system effect run amok on jargon-1....