Sharpening and caring for your knives is hardly an outdated skill you'll never use. If you're not regularly sharpening your knives, you're doing yourself a major disservice.
My best friend buys a new chefs knife every month at the dollar store
Ihe was throwing them away, but now he gives them to me. I’ve shown him how sharp I can get them and how long they last with the edge I put on them, but he does not want to learn or just give them to me to sharpen every few months.
I now sell his sharpened throw aways to friends and family for 5 bucks a pop.