When a manufacturer gives a product an uninventive name like the WH-1000xm4, it’s fair to say they could do with some more imagination or marketing pizazz. Then again, there’s no mistaking this product for any other. Apple devices, on the other hand, almost always have the same name, often even as they develop over generations. While this is great for branding, it’s a nightmare for people buying and selling used Apple devices and trying to work out their value. If you’re lucky, there’ll at least be an appendage like 1st, 2nd or 3rd generation in brackets behind it. But even that doesn’t really…