I have two slide projectors–my first one (that I inherited from my grandfather) was sort of broken, so I got another of the same model on ebay for cheap (it was broken, too, but in a different way) and one of these days I’m going to use it to fix the old one. I also have a projector screen. I have a stack of boxes full of family slides that is probably 4-5 feet tall. I’m the caretaker of the family slides, you see.
I haven’t actually looked at any of the family slides in over a decade, however.
That said, when I was in art school, we had to make a portfolio which included providing slides of our work. Many/(most if you believed the professor) graduate programs expect you to submit a portfolio in slide format, apparently. I know that Yale requires it, for example. So that’s one area that still uses slides.
There are services that will let you upload your digital images to them and they’ll mail you slides of the images. It’s generally less than $2/slide. The benefit even beyond the cost is that you only pay for slides of the images that came out well, and it allows for some cleanup/manipulation in Photoshop or similar before committing to film. I forget the name of the company that did my slides when I made my portfolio, but I know it was out of Arizona somewhere. Looking on Google it seems there are several companies that do this, and the pricing appears to be competitive.