> These kinds of similies make less and less sense nowadays because we've got nvme storage nowadays, and that can be as fast as 7GByte/s. That's a lot faster then the RAM in most devices today. And with less latency too.

7 GB/s is the low end of the DDR3 performance range; DDR3 is 17 years old. Meanwhile, DDR5 performance ranges from about 33.5 GB/s to about 69 GB/s. RAM latency, even on DDR3, is measured in nanoseconds; NVMe latency is measured in microseconds, making it about three orders of magnitude higher.