Before digital, I was absolutely dependent on poloroid. I had to shoot one and stop and look at it to mull over the composition, lighting and cropping. In fact I sort of miss it, even w/ shooting to a laptop, which can be a pain, especially outdoors. I rarely shot 35mm (most work was 2 1/4 or 4x5) but I even had a Nikon F3 w/ a Forscher poloroid back for when I needed it. I'm old enough to pre-date Powerpoint, and occasionally people need actual slides for slide shows.
It was an amazing product. I actually have a degree in chemistry, and I have no idea of how it worked. Here's to Edmund Land!