I bought cast iron pan which I think is the best ever purchase I made.
That’s no longer true. A dishwasher safe trend took over, most cheap knives are extremely hard now. I’ve a nice old set of not quite stainless that sharpen very easily and the ten thousand grit polish stone I have actually does something. Most new knives I sharpen for people I don’t even go over 3000 because they are far too hard to take much effect. My personal favorites are old Wiltshire 70s wood handled inox cleavers and Opinel knives, those opinel especially turn into a razor incredibly easily.