However, practical experience suggests that second-system syndrome is very real, and the cost of replacing 'obsolete' systems is often vastly higher than just m

However, practical experience suggests that second-system syndrome is very real, and the cost of replacing 'obsolete' systems is often vastly higher than just maintaining them, even taking into account the need to train people in skills that are difficult to hire for. But there's an entire industry which exists to soothsay away these concerns and get companies to upgrade, whether or not it really makes any sense. Nobody has an interest in encouraging companies to keep using their old gear and do internal training; many companies have an interest in encouraging upgrades.