I don’t think we can compare high end graded cards to modern sealed, and I don’t think there’s much overlap in the buyer pool. I agree we can consider both when trying to gauge the general size of demand.
If you were just using it as a comparison, then, in this example, I don’t see where the necessary supply for those cards will come from. If TPCi is building an entirely new facility having already bought a printing company, that should indicate just how short supply modern sealed–the items that are the most abundant–is in.
There’s no printer for PSA 10 Neo holos; while some new 10s may be graded, the pop is not going to increase by 5 or 10x, which is to say the supply cannot meet this new demand.
For the record I do think we’ll see some kind of retrace in a lot of these cards, but I think expecting a huge crash in hard to acquire cards is copium.