Exactly, they are quite often a back end system for many major companies. For simply that reason, they work and rarely have any issues. The problem is that tho

Exactly, they are quite often a back end system for many major companies. For simply that reason, they work and rarely have any issues. The problem is that those with the expertise to manage them and fix them in the event that things do go wrong are diminishing. And that's a big risk for businesses.