[TUHS] Who stated that the power of Unix stems from the wise choice of a few design principles rather than the endless accumulation of special cases

[Diomidis Spinellis]

I seem to recall reading that the power of Unix stems from the wise 
choice of a few design principles rather than the endless accumulation 
of special cases.  However, I cannot find where this is stated.  I tried 
a Google web and a Google Scholar search using the terms "unix endless 
accumulation special cases", and I also asked ChatGPT for a publication 
associated with this phrase.  I also searched for "special" in 
D.M.Ritchie's "The Evolution of the Unix Time-sharing System"  and "The 
UNIX Time-sharing System A Retrospective".  (Amazingly, both have 
several parts that still highly relevant.)

Can anyone help?  Am I misremembering something?