Unless there's a new paradigm, scaling up is all they can do to improve performance. They've shrunk down all the way to 1-bit models and all the low-hanging fruit is gone. There's no way for them to get much smaller, so they have to get bigger and faster to meet expectations.

Probably, but at some point we're very likely to run out of significant training improvements and it's not clear that we'll see that point coming from a long way out.

Likewise it's probably dwarfed by improvements in how we make dram - continuing the roughly exponential (maybe a bit less recently) scaling of chips - but not necessarily.

The 2x from returning to previous costs is interesting because it's practically guaranteed, and it's on top of everything else. We're just currently "overpaying" (relative to the stable market price) for the manufacture of dram because of a sudden increase in demand.