You can put lots of slides in an archival sheet. To look at them, you need a light table and a loupe. Since you're viewing the original, all of the data is there for examination. Prints take up more room and, since the negatives can't be viewed, all you have is an example from the original. Photoshop gives you the power of the darkroom with none of the mess and the ability to try different approaches for free.
Computer screens are also great ways to view photographs.
You aren't dependent on ambient light, so the image has huge range and contrast. PhotoCD is a nice way to use film and digital together. You have all of the information storage of slides or, better, negatives. A PhotoCD can capture much of that information at better resolution than the most expensive digital camera. There's a profession PhotoCD that has even higher resolution available.