All my life, I have used planes wrongly. I have used them mostly for edge planing and chamfering, and always tried to take too heavy a cut, and never sharpened (I was afraid to!) Now that I've really gotten into the sharpening thing, I tried planing the side of a piece of wood today, successfully. That may not sound like a big deal, but heretofore I would have sanded that thing, and not got as nice a finish. My unbranded Made in |Canada #4 plane of uncertain vintage was taking shavings of about .0015" to .003" depending on the set of the blade. The finish on the side of the cutting board I was working with is nicer than sanded, too.
Just sharing a growth moment. Can still find new things out, at my age.