This is very clever, although somewhat unnecessary, but still useful to know. The one thing I would call out is the author used WiFi because one of the laptops didn't have Ethernet. I've encountered this situation several times myself and I've found that nearly every modern laptop supports USB in both modes, so you can simply use a USB-C cable to connect the two laptops and get a pseudo-Ethernet device this way to interconnect them, no need to use WiFi. This is hundreds of times faster than WiFi.