More density means less longevity, less write cycles before the blocks wear out, also decreases the time before Nand leakage can end up corrupting the data. Doesn't seem like a good thing to me.
Oh yeah, also more storage space causes complacency with developers who will terribly optimize their games because they don't have to worry about games not fitting on people's disks. Think 100GB games is bad it'll get much worse when they got more free space at their disposal, and worse, the perception that their customers have tons of free space as well.
That's likely the point where spinning platters die in the marketplace.
Right now, spinning platters are around $12/tb. SSDs are around $75. Exact numbers fluctuate with features and market changes, but those are the ballpark. Cut in half, SSDs will be $38/tb, and then $19 in the next halving. Spinning platters aren't likely to see the same level of reduction in that time period; they're a mature technology.
I think once they reach double the price per tb, we'll see a major collapse of the hard drive market. My thinking is that there's a lot of four drive RAID 10 systems out there. With SSDs, those can be two drive RAID 1, and will still be faster. With half the drives, they can be twice the price and work out the same.
Probably being paranoid, but it seems to me like one of the few untapped utilities of this much cheap storage is just increased surveillance. Hi resolution recording of everything, all the time.
That will be helpful. Unless I want to prune my node, I should probably consider upgrading my storage space for my Monero node in the near future anyway.