I'm going to switch discussions to cover a low-tech gadget that was ubiquitous when I was a kid, but modern times have left it as a distant memory. I refer to that simplest and most useful of tools ... the "church key." You know it as the bar of metal with a bottle-cap opener at one end and pointed canned-drink opener at the other end.
Now, you have twist-off bottle caps and pull-tab cans, leaving that simple but eminently practical and popular tool to rust away to nothing in the back of the kitchen "junk" drawer.
I miss simpler times.