As a result of my campaign against single-use kitchen appliances, I have never owned a toaster.
They take up too much space for the limited function they provide. But a few years ago I was convinced to purchase a GSI Glacier Stainless Toaster. It works great to toast a piece of bread, and collapses flat for storage. I appreciate that it works just as well over a fire or camp stove as it does on my kitchen stove top. I’ve never actually taken it outside of the kitchen, and would never consider packing it on a backpacking trip, but for something more luxurious, like car-camping or horse-packing, it seems like a perfectly viable option.