[kemayo]

I was looking at that teardown myself to see whether this was the case, and I don't think it's enough information to say -- that's a teardown of the model with 16GB of RAM, so it's not impossible that the 8GB model might leave some of those areas empty rather than switching to lower density chips.

[cptskippy]

It's also possible that it varies depending on DRAM prices. You might have models with 8GB populated single sided and others double side. Same goes for the 16GB models.