Comment by Apreche

Reminds me of this story from 2021

https://hackaday.com/2021/10/06/atari-st-still-manages-campg...

I have also met some people who worked at large old insurance companies. They originally used old mainframes and TUI, and the companies still exist. They told me of various things that were done. Of course migrations happened. And interfaces were built so that modern systems could speak with the old, sometimes via terminal emulator. And of course, some old systems still in use far beyond their time.