Black anodized things have a bad problem with scratching and showing fingerprints (my black Razer laptop looks very smudgy unless you wipe it down regularly), so I think Apple has intentionally decided to go with a bit of a lighter color to try and avoid some of this. Maybe if they could come up with some kind of other material or coating (similar to the Jet Black iPhone a while back) then it could work.
I don't see them going back to a plastic and polycarbonate portable again, and for the record those black MacBooks had terrible problems with the plastic on the wrist rest cracking.
They did, but 18 screws later you could replace it with another top case... 😂