I have an electric “Above All” can opener mounted to the bottom of a cabinet in the kitchen. I got it for next to nothing at a yard sale about fourteen years ago. It still works great. I also have a church key with magnet stuck on the frig (hey, there’s no d in refrigerator!). I have several manual ones in various multi-tools and pocket knives.
I recently bought a flat credit card size multi-tool (with a can opener) at Dollar Tree. Its display was labeled “Last Minute Gifts!” so I figured I’d better hurry up and get one. Really, I just wanted to see if one could use the thing at all, since two adjacent edges of it are a knife blade and a saw blade. I have concluded that none of the three “wrench” functions on it can be used without lacerating one’s hand.
This is the type of device I was used to in Hungary. There’s a more basic looking version of that, and I remember being so confused until somebody showed me that I’m not supposed to hold it vertically, but rather horizontally to the can. I don’t know if that cuts into the side of the can or not, but I can’t see how any can opener would open a can without cutting into it.
ETA: This is the kind I used. Cuts from the top and around the side rather than down and into the lid.
I have a nifty tiny can opener that I think works great, but Pepper Mill can’t use it, so she has one that cuts from the side. I like mine better than the smaller kind they used to include with Army ration kits, because it’s much faster. Heck, the Can Opener blade on my Boy Scout knife (which I still have, and still use) is faster.
I own one because I needed it before pop-top cans were in use. Nowadays I use it to open the other end of a pop-top can so I can crush it easily for recycling.
Huh, I use my can opener to open cans of beans, cans of cranberry jelly, cans of tomato sauce… Lots of stuff doesn’t have pull tops. (Although some of the brands of beans do.)