Whether you’re designing a complex digital product or operating a simple manual tool, some things never change. Take these essential user traits into account to avoid roadblocks and surprises. — User Lessons from the Humble Can Opener You probably keep a few canned items in your pantry: beans, tomatoes, soup, maybe some pumpkin pie filling this time of year. Non-perishable, ready-to-eat food is convenient; it helps us get dinner on the table (and pies in the oven) exponentially faster. However, cans are metal. …