The presented evidence isn't very convincing. If the author had less memory, the browser would be (or already is) swapping individual tabs to disk and many of his apps wouldn't be caching things in memory as aggressively while in the background.

The real key here is the PCIe NVMe bandwidth. If macos could swap in and out all of two entire memory heavy applications in a fraction of a second, the RAM size isn't as important as it used to be.