My 14" MacBook Pro came with a small, rough scratch where the removable bottom cover plate meets the upper enclosure. I think it's actually a rough scratch on the inside edge of the upper chassis.
I can feel it slightly if I run my finger over it - as if something rough was taken out of the case during assembly, scratched the edge, and is slightly higher than the removable bottom cover because the edge of the metal is rough.
Think of running a cheese grater over the edge of a piece of metal, but on a much smaller, finer scale. Again, I can feel it slightly if I run my finger over it.
I didn't notice it until after the 14 day return policy. I did inspect the computer before I used it, but I missed the damage. I bought it from a big box retailer - an Apple authorized reseller. I don't want to say which because the machine was factory sealed, and I don't want to disparage them online. I am very picky, and I am convinced this was not a repackaged return - it was new from Apple.
The computer arrived like this - from outside in:
1) Retailer's brown shipping box to me.
2) Apple's brown shipping box with perforated "rip cord" intact.
3) Apple retail packaging factory sealed - rip strips intact.
Since it was past the return period, and the computer was functioning properly, I decided to live with it. I might have been able to convince the retailer to exchange it, but I decided to try and accept it. Am I concerned that components inside the computer may be damaged? Yes. Unfortunately, since I was past my return period, albeit by less than a week, I decided to keep it.
Is this damage acceptable? No. Do I regret missing it on initial inspection? Yes. Should Apple's QA be held to task? Yes.
Unfortunately, in the past, I have received an iPhone 5S with a dead speaker, an iPhone 11 Pro with a scratch on the stainless steel band (Apple gave me a refund, and I bought a new one), and I also purchased TWO iPhone 14 Pros. One of them had a small cosmetic imperfection in the stainless steel (the anodizing process missing a small part of the band?). I exchanged it, and the replacement came with a similar imperfection. It was very small, and I use a case so I decided to live with it instead of the headache involved with exchanging again. Additionally, I had three Apple leather cases where the lightning and speaker cutouts were misaligned - the cable hit against the side of the cutout, and put pressure on the plug.
My 5S and 11 Pro I chalked up to being unlucky. My latest purchases, in a short period of time, I chalk up to dwindling quality control.
Click and zoom on attachments to see the scratch. It was hard to capture on camera, but it gives you an idea of what's going on.