Comment by setr

It's possible, and it's possible to avoid losing source code, and its.possible to have valid backups, and keep your servers decemtly secure... yet it's sufficiently common (especially as the program ages) that its not trivially attributed to competency; rather you need continuous, unfailing competency, in the face of continuous environmental change (local changes, within the business, and external changes, as business needs change, and mergers occur, and people quit/fired, etc)