[mardifoufs]

I have never seen anyone in my third world home country just carrying or even owning an SBC. Even the poorest people just buy a phone because it's wildly more useful and does not require a peripheral. Otherwise, they buy an older computer that can be had for cheaper than most SBCs.

Actually, I'd argue that the market segment is squarely a first world one, mainly because it's far from the most convenient computing platform and alternatives are far more useful when you can only afford to own a single computer. Being unable to make calls or use messaging apps (access to whatsapp is almost a requirement in tons of countries), and coming with no built-in battery makes them a complete non-starter as a potential main device.