“The UK Government Digital Service recently wrote about how they understand legacy and suggested a number of factors that contribute to technology being considered legacy: being poorly supported, hard to update, poorly documented, non-compliant or inefficient. The range of breadth of these negative characteristics runs counter to an often passive view of legacy: stable historic technology that is intended to be replaced. Organisations should begin to think of this technology as toxic: actively harmful to the health of the organisation.”
Original source: Toxic Technology: the growing legacy threat