Plus a cache drive can also be used for other storage devices like USB Flash Drives and Hard Drives.
It does mean it is very algorithm dependent, but I would assume Sony and Microsoft have the appropriate data points to see how people generally use their devices anyway and gear the caching algorithm to those use cases.
We just don't have enough information either way.
For all we know it's actually using slow and cheap QLCD NAND... But has a secondary fixed function processor for decompression duties so it's able to quickly unpack data so it can get more bang-for-buck with transfers.
I'm a bit more hopeful this time around because I was pretty impressed with what they did with the PS4. It sure is a lot more difficult this time because of diminished returns. They want to wow people with numbers but those haven't increased as much as they have from PS3 to PS4. Maybe they'll feel forced to take a loss again to put more stuff in. They should be fine next gen considering how dead Xbox is currently.
Agreed. Next gen they very much need to "think outside the box" to push visual fidelity... Something that was a strong point during the 7th gen with baked lighting and shadowing detailing in the texture work... So when a games visuals shined it was because of amazing artists, which games like Uncharted and Halo 4 fully showcased.
The CPU gains will be one of the largest in any console generation though, that makes any tech-head moist for what it might potentially mean... We started to see hints towards it's potential with things like Horizon Zero Dawn having micro-simulation of things like ants crawling up a tree.