Well, I suppose if you were DosDude2 you could upgrade the memory, but for us mere mortals that don't do chip-level swaps and mods, we're out of luck. When I was getting a newer MBP for my daughter (she had a mid-2009) I researched which was that last fully-upgradable model, and got a mid-2012 for her on fleaBay (bought one w/o a disk and a minimal amount of memory, since I was upgrading those).
Now her machine is acting up, and I may have to get a newer one for her (would rather give her a ThinkPad with Linux, but she was using some Mac Apps)
@mayer is right. Apple products are products from the Outer Limits, certainly not from here on Earth.