It's a bit of #geoffmylawn brag but it was a much smaller community back then.
Looking at those names: I was over at #1 Symbolics quite a bit in those days (a bunch of people from the lab started the company). #3 Thinking Machines was started by my housemate Danny Hillis (I was there quite a bit visiting friends as well). I actually worked for #4 MCC and #7 Xerox (PARC in my case). I started Cygnus with John Gilmore (#84 Toad) who was previously the first employee at #12 Sun (where other founder Tiemann had also worked).
Many of the other companies on that list hold fond memories as well. Amazing!
At 35 I'm not sure I qualify for greybeard status (perhaps relatively), but when you write something like this is there some illusion that everyone reading a tech piece is under 25?