"There are some things that a slide rule is superior for -- one item I can think of is visualizing an arbitrary range of fractional values." Exactly, similar t

"There are some things that a slide rule is superior for -- one item I can think of is visualizing an arbitrary range of fractional values." Exactly, similar to the way log scales make visualizing a range of results across the slide rule no matter what one is doing. Similarly, I have a number of good digital multimeters but I also keep several analog AVO meters, https://en.wikipedia.org/wiki/Avometer https://en.wikipedia.org/wiki/Avometer, to give me a sense of proportion if I'm adjusting something (nulling a discriminator etc.).