to be fair, budget 8gb gpus have been a thing since the RX 480 (2016). if somone has less nowadays, id reckon its refusal to buy used, or refusal to buy something thats not nvidias sub 200$ market.
while yes, there of course are poorer regions. but even regions like brazil who have a ridiculous import tax on tech, still regularly stock the rx 580 as a "budget" gpu option.
if you go low enough, the user might as well have an igpu, which does not have the same vram limitations discrete cards have.