IMHO there are two important uses for cadence on a cycling computer. (1) Help a newbie learn what a decent cadence is -- as caloso mentioned, don't mash! (2) For a loaded tourist, it can be a help to avoid mashing and hurting your knees. For the tourist, mashing is problem that's accentuated doing repeated long days, with heavy loads in steep terrain.

Since neither of these apply to you, cadence: isn't that an interesting number!