A topic very close to my heart.
In earlier less experienced years I sought to preserve our 35mm slides, the most precious collection of pictures and memories gathered during a year of overseas travel through the Middle East and Africa. I had waited for years before an affordable scanning solution became available. Unfortunately I scanned the images at an inferior resolution, that I thought at the time would fit the bill.
We lost all the slides in a house fire about a year ago.
300 sildes preloaded into round projection cartridges.
We placed the gluey mess of melted plastic, and smoke destroyed celuloid in a corner of the garage to weep over ever now and again.
Lesson 1 - Scan at MAXIMUM resolution.
Lesson 2 - Don't empty ash trays into rubbish bins.