Pi-Like Board with socketable ram

Is it possible to make a RasPi board like the Pi4, but instead of being stuck with whatever ram you choose making it so the ram is socketable? Like if I buy a normal desktop computer with 4 ram slots I can buy 2 4g sticks, but later upgrade to 4 8g sticks if I want. I have no idea how it would affect cost or of the type of ram most SBCs use is socketable, and beiing able to purchase a 2g SBC to start with and then buying more ram later if needed would be amazing.