these boards werent consumer producs though. playstations are produced for years with no alterations.... millions of times. i.e. playstation 4 was sold ~100million times. thats most definitely at a scale where you can automate with margins.
Game console manufacturing definitely is low-mix compared to cars, but it's not like they're stamping out spoons: depending on how you count, there were something like 19 revisions to the PS3 motherboard, as Sony worked to reduce chip count and shrink PCB size: https://www.psdevwiki.com/ps3/Motherboard_Revisions
Specifically, in the context of assembly, as long as dimensions and locations of each connector stay the same, it does not really matter for the automated assembly line.
I was trying to clean the dust out of my PS4 a little while ago, and had to browse through quite a few YouTube videos before I found a disassembly tutorial that matched my model.
