The 13" mbp has always been the baby sister, baby sisters grow up always behind the bigger sisters, obviously, duh, big sisters go through all the growing pains way sooner, some drop off the face of the earth too young (17" MBP), others get a lot of plastic surgery (15" rMBP) because they are jelly of their baby sister (11" MBP) for being so thin and light.. So popular with the boys and all.
Baby sister 13" mbp unlike real people sisters, due to Apple, will not get a huge CPU job with what ever quadcore this or that, no, so put that fantasy away, she is small and young, don't put that sort of stuff in her mind - repeat after me "TOO SMALL"!
Apple wants you to act pro and buy their 15" maxed out retina overpriced macbook, but it has a lot to live up to its oldest sister the late great 2011 17"MBP. Who knows even if she is actually dead, she could have just went off social media to find herself on some epic interstellar retreat? Who knows!
Put those fantasies away of the 13" having quadcore. This is Apple we're talking about, they don't make fantasies - they now make very serious consumer brand name gadgets like the rest of them. Smarten up!
I love you too.