Yes. Realistically you'd just go with higher density RAM chips, which I'm guessing are gonna be more costly per GB as well... But the upshot for a manufacturer

Yes. Realistically you'd just go with higher density RAM chips, which I'm guessing are gonna be more costly per GB as well... But the upshot for a manufacturer for higher density memory, if the 'failure rate' of fresh parts is the same, well it's better to have less parts of a fixed failure rate ofc.