Don't you mean Japan?
No...wait...that was a generation ago.
Ya' nailed me there because I've been out of that business (but not the hobby) for quite a length of time.
I wrote my last commercial application in 1998 and it is till in use today, but in a short time, it may as well have been written in Egyptian hieroglyphics.
For many years I worked in a group making custom tooling for a semiconductor fabrication operation. We expected our projects to be productive for a minimum of five years and considered extrapolating past ten years to be totally unrealistic. Sounds like your application has done just fine.
When I visit the plant (which is quite infrequently now) I take considerable pleasure in seeing that a controller I built in 1975 is still operating. I would be very surprised if anybody still there knows that. Or cares.