No one has corrected this yet, so I'll do it: it's 64GB of RAM!
The Mac M1 Max the author used is an absolute beast of a machine. I have a M1 Pro (which is not as fast) and it's ridiculously faster (and quieter - it barely needs a fan) than my Linux Dell XPS13 and older Macbook Pro.
So, an Apple Newton in a laptop form factor?