:critical mass: n. In physics, the minimum amount of fissionable
material required to sustain a chain reaction. Of a software
product, describes a condition of the software such that fixing one
bug introduces one plus {epsilon} bugs. (This malady has many
causes: {creeping featurism}, ports to too many disparate
environments, poor initial design, etc.) When software achieves
critical mass, it can never be fixed; it can only be discarded and
rewritten.
-- The AI Hackers Dictionary
econd-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....