I think, with photographic equipment in particular, that performance has has improved so much in the past couple of decades that old cameras are no longer up to scratch. Image stabilisation and the ability to check photos as they are taken together with the image manipulation on computers and the easy distribution of pictures to friends has made the old film cameras redundant as well as expensive to use. Modern zoom lenses are smaller, lighter and of better quality than the old ones.
In the old days I used to take about 20 films on holiday; the film wasn't cheap and neither was the processing and my albums take up a lot of space in the house. Now I take 2 memory cards (one as a spare) and take stills and video with the same camera.