Part of what I loved so much about them is the number of free shows they put on. I can always pin the year that I saw them in Prospect Park at 2010, because the iPhone 4 had just been released, and my friend who I was with proceeded to watch the entire show through her new phone, being completely enamored with the "retina display" while tripping on acid.
When I saw them in 2008 in Battery Park, I had the pleasure of sitting on the lawn next to 90s child star Danny Tamborelli, who many will remember as one of the stars of Pete & Pete (a show with its own sort of indie cred). My friend I was with turned to me and said "That's Danny Tamborelli, we need to say hi to him" and before I could get "No we absolutely do not" out of my mouth, he dragged me over and proceeded to introduce us saying "We're great fans of your work". So I shook his hand, way too high for this interaction, as Thurston took a drumstick to his guitar in the background.
I miss Sonic Youth a lot.