This upsets me more than I would have realized. Squire casts a long shadow. He's one of those guys who influenced even those of us who were never deep Yes fans for whatever reason (I never disliked them at all, in fact I quite enjoy the songs I've heard, I just didn't go that deep into prog in general). I remember when I was about 14 my uncle giving me a mix tape with both "Does it really happen?" and a solo song "Hold Out Your Hand" on it. As a young adventurous bassist I was really taken with the bass work on both. I used to try to play along with both (badly). I can vividly recall them to this day.
Going to see Rush tomorrow.. I think it's fair to say Rush would not be what they are without there first having been Yes in general and Chris Squire in particular.