For me longevity is the key. When I see systems that still do their thing after a long time. I had a backend EPOS system that ran for 11 years, a pensions syste

For me longevity is the key. When I see systems that still do their thing after a long time. I had a backend EPOS system that ran for 11 years, a pensions system that is still being built upon 17 years on (though that could have an element of a Ship of Theseus[1] about it) and genealogical search system that is running still after 13 years at a library. The last one I didn't even know about except someone mentioned to me they'd gone to the library and done a search and so I had a sneaky visit myself and saw it was the same old dog of a local network PHP website... [1] https://en.wikipedia.org/wiki/Ship_of_Theseus https://en.wikipedia.org/wiki/Ship_of_Theseus