That's cool as a project, but I don't really see the point. Everything's hungry for memory these days. DDR3 is a relative bargain. Why not put a socket on there so you can add a cheap 8GiB laptop DIMM?
Hey! Not everything needs to have a point. (Or else why would there be 20 AI models competing) I did this mostly for the fun and challenges, because why not! :-P