As a classic owner, you may have noticed that the driver's door in particular drops slightly when opening. When closing, you must lift the door slightly. So there is play. Incidentally, if you have not noticed it yourself, the MOT inspector will do so if you bring your cart - when applicable - for the inspection.
In many cases, a door hinge cannot simply be replaced because it is welded to the door frame. With British Fords for example, but also the German. Has nothing to do with quality, but just with the life of the car. Nobody ever thought that a car that had a lifespan of seven years before it still exists more than thirty years later. That has to do with 'our' hobby. In many cases the hinge itself does not appear to be worn, but rather the hinge pin that holds the two parts together. With a punch and a hammer you tap it out (from below) and replace it with a new one. For such a job you do need an assistant and patience, because the worn-out hinge pin will not just give in. Prevention is always better than cure. Regular drops of oil on all hinges do wonders!