Those are cute examples and all, but the LINC was (in today’s money) a half million dollar machine and the PDP-8/S cost Peter Zinovieff the equivalent of over 88,000 uk pounds. (Around $110,000.) These are clearly examples of work being brought home.
Again, I’m totally willing to take these as examples of why you can’t say (insert name here) “invented” the personal computer in 197x because functionally they were just replicating in a much cheaper form a computer you *could* technically buy off the shelf in 1967 (and the credit for making this possible lies pretty much entirely in the hands of the collective silicon chip industry, they knew exactly what they were selling), but *practically* speaking sane humans generally agree that a “personal” or “home” computer can’t cost more than the building it lives in.