I never have sharpened one, so just gave it a go on the one I was about to throw away at work. Gave it a clean to remove all the tape residue and gave it a few swipes through the ceramic on the victorinox sharpener, surprised at how sharp it got it fast.(Image removed from quote.)
Easy just to toss the blade but since you've got to remove to do so a quick touchup is just as easy. Most blades like that also have to be turned around to utility the other end which is a good time to touch up. I will continue this with my blades till it no longer makes sense to do so. It I worked in a fast pace environment I'd replace as needed but I'd still keep the blades.
Back in the day, and I'm talking waaaaaaay back I used a simple box cutter when I worked in a warehouse. I tossed the blades as needed. Fast forward to just a few days ago, I was thinking about my Gerber EAB and why I have not used it. I got it from the tomb but the blade was dull. I went looking for a replacement and before I got too immersed in my search I decided to give it a sharpen. Am I the only one? I get it, the blades are fairly cheap, but why toss? Mine is screaming sharp again and I'll continue to resharpen as needed.