A wafer looks pretty big. I'm surprised it has only 44GB of memory available. Doesn't that seem a tad .... low? I'm not a hardware person, but I would have assumed much more memory would fit into a wafer?

It's SRAM. It's the equivalent of 44 GB of CPU cache.

traditional SRAM memory has 6 transistors per bit. Dense SRAM can have two transistors.

Wafers can have trillions of transistors, 10-16 times more than the 4 trillion of the WSE-3.

1 Terabyte of SRAM per wafer will be the upper limit for a few years [1].

[1] https://youtu.be/vbqKClBwFwI?si=gbBeZ1B66_eGI81Z

SRAM doesn't shrink as well as other types of circuitry do when process nodes advance.