> That hasn’t been true for a very long time? Unless by "technical" you mean sending an email with the file in question attached.
Was it ever true?
It's even easier to just load the book over a USB cable, assuming you have it in mobipocket. It's a "technical" process in the same sense that using a USB key is a "technical" process - one that everyone is already familiar with.
Though I do remember that the packaging for my Zen Stone specifically indicated that it would only work with a Windows computer. That wasn't true; it showed up as a USB device and you could transfer files just fine regardless of your operating system. There wasn't even an alternative proprietary method to use on Windows. The manual carefully covered the meaning of the directory structure on the device. I'm not quite sure why they claimed to require Windows.
> one that everyone is already familiar with.
You'd be surprised. Many people genuinely aren't familiar with it these days because it's not necessary for other devices they're using day-to-day. E.g. most don't upload music to their phones in this manner like we used to 20 years ago - more often, it's all "in the cloud", so you just install the app and sign in.
Having to own a desktop would be somewhat technical already. And you need the right format.
Nowadays, they support epub and you have the email thing (though as a sibling mentioned, they are apparently not allowing automatic email deliveries for paid books anymore)