I don't use mine for grating cheese either. I like it for nutmeg, grating ginger (sometimes), zesting citrus, and have used it for shaving chocolate.
I agree about electric can openers, however, they are very useful for people that have difficulty using their hands, such as people with arthritis. I wish I'd had one when I had a similar problem. Many of our cans are kift off, but certainly not all. Also, most American kitchens are big enough to hold such a device.
The can opener that attaches to the wall and swings away is still available here. It's a very traditional model - we had one in my childhood home as far back as 1947. Swing-A-Way Magnetic Wall Can Opener : Target
The same company makes a pretty good hand-held can opener as well.
My O My - that's a blast from the past. While neat from an historical perspective, a regular modern toaster seems much more practical for people wanting to toast other types of bread besides regular slices. A toaster that will hold large slices, wide slices (like bagels), one that can handle three or four slices, and that works automatically seems more in keeping with contemporary times. Still, I think it's nice, but how well does it work on an electric range or the new induction ranges? There are a lot of those here in the US.
That explains a lot. My kitchen is quite small as well, and an old fashioned one at that, so it's easy to relate to your space predicament. I don't care for a lot of gadgets and "labor saving devices," and I'm lucky I don't. I don't know where I'd put them.