Of course everything is _possible_. But with the added space of DIMM sockets, something has to give. Bulkier laptop, less battery space, or something else. That

Of course everything is _possible_. But with the added space of DIMM sockets, something has to give. Bulkier laptop, less battery space, or something else. That is why you don't see iPad or iPhone competitors with DIMM sockets either. Of course Apple doesn't have a big incentive to add such ports, but the fact that they've left them on the desktop Macs and the non-retina (and bulkier) MacBooks are an indication that it's not primarily a business decision, but more likely a design decision.