But pressing isn't "new" starting today. It's been going on for a while. You don't think people have been looking at Hulk 181s for the past few years? The reality is, pressing a book into a 9.9 isn't like just turning the press to "11" and watching the magic happen. Books that can grade out at 9.9/10 are FREAKS of preservation, to find a book with a slight, pressable flaw that could turn into a 9.9 is probably just as rare as finding a true 9.9, just because it's got to be an uncanny combination of issues.
+ infinity to the part in green. What normally gets perfectly preserved books a 9.8 instead of a mint grade is almost never pressable. Tiny bindery tears, tiny flecks of white at a corner, tiny, nearly imperceptible spine tics on otherwise perfect books. I would love to hear anyone post a "press to 9.9" story, because I don't think one exists except for people that are pressing moderns.
The questions about pressing gloss over what seem to me to be somewhat bigger questions. One being that if a book is really as common in all grades as it would be if it were printed today, then how much can any copy be worth? And if 9.8s and 9.9s are subjective and virtually indistinguishable from one another (at least in terms of non-microscopic presentability), then the value depends on how much value buyers place, and will continue to place, on a difference that cannot really be seen. And, perhaps more importantly (given the slabbing process itself and "shaken comic syndrome") on whether that infinitessimal difference continues to exist forever except on the label itself.
There are real, observable, albeit extremely subtle, differences between 9.8s, 9.9s, and 10s. Anyone who says they don't exist is ignorant or lying.
But.
For the vast majority of people,these flaws are meaningless because they require a certain type of focus that, frankly, most people don't have. And that's fine. For them, a 9.8 becomes the functionally highest grade they can, or should, care about, and that's perfectly fine for most people.
But, again, that dosn't mean there isn't a difference. There is. And I'd be happy to point them out to anyone in person should they so request it.