Originally Posted by
SanityOrMadness
It's not the scans that's the problem. It's the pages, and having to reverse-engineer from sub-optimal quality:
1) The issues were originally printed on low-quality newsprint, where the ink spread in slightly unpredictable ways. Even when new, the linework wouldn't precisely represent the original art.
2) Registration issues, both from the Little Old Lady production line that worked on the colour separations occasionally being sloppy with scissorwork, and more generally from plates going out of alignment. At the time, that wouldn't have been considered serious - but for a high-end, high-cost reproduction in the 21st century?
3) Age. Even if there's the odd random find in some place which makes a splash when CGC deem it a "9.8" or whatever, these were printed on cheap acidic paper for kids 70-odd years ago. Finding a copy which is so much as intact is not easy. Even if they do, there's almost certainly going to be age-related blemishes and problems with the comics they get.
I mean, I'm sure the scanners have improved over the years, but it's still a case of garbage-in-garbage-out.