This is a devastating news. I'm writing but I have numb eyes - don't know why - after reading this post.
Now i know why I didn't see notifications of his posts in last couple of months.
Last year when i joined the Gmatclub forum, I posted my first explanation of an official question only after couple of months. I didn't know how to make posts(leave good posts that contribute something) I could not believe
daagh gave kudos to my post and commented, to which i was joyous like a kid gets. This encouraged me to write more and get into depth of SC questions.
I adored his every explanation. His explanations made me address him as SIR always - they are like Yoda of explanations. The explanations are abstract(pure grammar with no fuss) and an absolute must read for 700+ level questions.
I wish i had a chance to talk to him.
RIP daagh.