One of Apple's actual secret sauces is they can make their big caches fast. Typically latency increases with cache size so it's a tradeoff. Apple trades off less here. And it's not some "only fast because tsmc" it's just really solid engineering at both the architectural and physical design level.
"The memory is not inside the package"
vs.
"The SoC and RAM chips are mounted together in a system-in-a-package design." [0]
Every mobile SOC does the same? All Intel SOCs do this? Which one? Can you point out the 16Gb of RAM in this Meteor Lake SOC?
https://images.anandtech.com/doci/20046/Meteor_Lake_Hotchips...
The Wikipedia article on Meteor lake doesn't even mention memory at all [1]
The drams on an apple chip are still bog standard lpddr. Most benchmarks find the actual memory middle of the road at best.
Critically they aren't magically on the die or any more inside the package than most other high end mobile chips.
2. "It is in a package like no other vendor, but it's not changing performance"
3. ???
ram is ordinary POP, you got lied to by Apple marketing. If you acted on this marketing and spend money then re-programming will be very difficult with brain actively fighting on every step to prevent cognitive dissonance.
It is cool to live in the future where 243 GB/s is middle of the road.
It is still impressive that Apple pulled it off 2 years ago, IMO.
Anyway the point is, this is not a meaningful performance benefit as it's still just off the shelf LPDDR5. In fact the M SoCs tend to underperform in memory latency tests.
"Anyway the point is, this is not a meaningful performance benefit"
Do you have a benchmark to read? This "Still LPDDR5" is hand waving.