Observations:
1) He mentiones twice the weight of the cables! Why did he not make his own sleeveless, 4-wire, right length, Ethernet cables?
2) What kind of respectable computer geek numbers 32 Pis rpi01 to rpi32?
“2) What kind of respectable computer geek numbers 32 Pis rpi01 to rpi32?”
It looks like he has an “rpi00” sitting on the top of the case in the picture ... seems like there’s a total of 33 rpis actually :-). Maybe the top one runs some kind of main program and distributes the tasks to the 32 others. Just speculating.
(Acknowledging that edh pointed out the zeroth RPi in a later comment... nevertheless...)
My first thought was, "He must program them in FORTRAN!"