My grandmother had 2 items mounted next to her kitchen sink. I don't know how young I was when I was 1st aware of them but I was just a little kid. A can opener & a jar opener. They were there until she died (in her 80's). She never replaced them or any part of them & they never failed, they outlasted her. Below is a can opener that pretty much the same as hers & the jar opener is the same idea only her's was mounted & perment & made of steel, the jaws were serated& you only needed to push the lid of the jar into the "V" shaped jaw & twist, it open everything, all the time.

Can opener

Jar opener

I love a good knife. If you don't know how to keep them sharp there a sharpener that's like a double wheel where the blade fits in at the right angle & you just roll the blade. Bread knives are a different story though.

Barry