@gemlog I tried and failed to find an old rant to link to.
Summary: There are something like 17 types of can openers. Most of them are useless, most of them are lethal.
One is simple without moving parts, durable, ergonomic and effective. It can only be found in Sweden, and isn't always easy to find there!
But for the moment it's in IKEA! A friend has offered to ship it as HK IKEA doesn't have it.