Addressing the last three or four posts, I would say that the ego/arrogance factor iss variable, even within individuals. I had a multi l-decade SAS R&D career with the life/work ups and downs one would expect over this duration of time. It was often an opportunity for learning, personal growth, and adjusting my approach to others.
Also, true is the fact that interpersonal
communication styles/skills can differ even within one individual, so one person might perceive another as being humble, while on that subject's worst day at work they present as being rude/arrogant.
SAS did have something very special (with mostly A players, especially in R&D) in its earliest days and I think this mostly carried through until the mid 90s.
I was fortunate to have periodic experiences with engineers and business people outside SAS and this helped me realize just how good the best people are everywhere. I strove to live up to their excellence during most of my SAS career (although there were a few lapses due to personal circumstances).
SAS did pioneer and engender a very special workplace culture that gave many of us with the sense of pride and "specialness" that others have pointed out. No doubt the employees of other successful tech companies feel similarly during their era(s) of greatness.
IBM, Google, Oracle, Amazon, Microsoft, Meta, Apple, Salesforce, etc. all have very strong and even insular corporate cultures (and often amazing people :-)). This is certainly not unique to SAS.