Your AS/400 is held together by three people. One just turned 62. What's your plan?

This isn't a hypothetical.

It's the most common conversation we have.

A business running an AS/400 - or something like it. Three people who really understand it. One of them is approaching retirement. No documentation. No succession plan. No one else in the organisation who knows what's inside.

The system doesn't care. It'll keep running.

Until it doesn't.

The risk isn't the software. It's the knowledge.

Institutional knowledge walking out the door is one of the least-discussed legacy risks - and one of the most real.

What's your plan?