@ovid @DanielEriksson @cstross Post-y2k I worked on grocery industry infrastructure — price and inventory stuff that was also running mostly on mainframes. Years got fixed, but similar mistakes happened all over the place. In one example, software had been built with a fixed 4-digit price field. Had been fine for decades, but inflation did its work and one product — the most expensive champagne the store’s liquor department carried — tipped over the limit.