You can still buy DDR3 new for not that much? 16GB is about $50 from numerous brands on Amazon at the moment. I bought some for an old laptop a couple months ago.
To do CPU upgrades you eventually have to replace the motherboard but you can keep using whatever your GPU/storage/other parts is. Sometimes that also means a RAM upgrade but it's still better than the literal nothing of modern Macs.
To do CPU upgrades you eventually have to replace the motherboard but you can keep using whatever your GPU/storage/other parts is. Sometimes that also means a RAM upgrade but it's still better than the literal nothing of modern Macs.