because the return rate is probably high. there is a a lot of variance between screens. Apple QC stinks these days....
Proof:
https://forums.macrumors.com/threads/1831739/
https://forums.macrumors.com/threads/1814524/
I would have bought one already. but Apple continues to use crap LG LCD modules that have defects. just like the LG LCD's that had ghosting issues on the rMBP's..... should have just used samasung or sharp....
Can confirm. My 2012 15" rMBP has an LG panel and ghosting issues. I don't let it bother me and a replacement would have been a lucky dip. But Apple need to get better with their displays. I was really hoping the 5K iMac wouldn't suffer the same fate, clearly it has.