I guess I should feel old, but I don't. I shoot shotguns from 80-100+ years old with lots of drop at comb and heel. I use tin lined copper pans, which I have learned to re-tin myself. I have some split cane fly rods. I use single stage loaders with balance scales. I regularly use ancient wood and metal planes and chisels on doors and other wood projects, just keep them razor sharp. I like walnut and blued steel and chrome moly barrels for the most part. I like rust blueing. Except for pictures, I would be as happy with a flip phone. If someone broke into my house, I wonder if they would even take half my stuff, or know what to do with it.
What obsolete things do you still hold on to?