What are you cutting?
I mean, I have used the same knife for chopping veggies since 1999, have never sharpened it, and it still works like a rough ridin' boss. also, it was like $40. So if it did stop it's boss-like working, I toss it and buy another $40 knife, or pay someone like $20 to sharpen it for the next decade of use.
Also, I cook a lot. I mean, a lot.