Clutter - and what to do about slides?

Why is it so hard to throw things out? Once I'm in the mood, it's easier - been going through old photographic slides from my father's stuff!  I've chucked everything except for the ones with people on. Now how do I make slides visible without a viewer?

Jack in South of France from a slide - attempt 1.

Jack, my dad, in the 1970s, I think  - in which case,  he was in his (early?) fifties.
I did this on an improvised lightbox, with plain white paper as base - slide placed on top.  You can see the texture through the slide. I used my 'normal' lens, not macro.  I shall try tracing paper for my next experiment.

Then I pruned some packs of photos of my mother's - I reckon that when the person who took the photos is dead, the scenery is meaningless.  And if any of the photos are works of art - if the photographer doesn't do something with them, no one else will.
Simplicity before all? In fits and starts.