Even brand new kitchens get replaced if new owners don't like the style. Just like perfectly painted walls get repainted in different colors all the time or like some people move around furniture to get a "new room feeling".

Also I would say software may not deteriorate on its own, but in the context of other software/technologies moving forward it does deteriorate. For example many old games kind of have deteriorated because they don't easily run on modern OS any more.

Tech debt isn't real. It can't hurt you. /s