To the OP: Since you asked, this will also be my 39th consecutive Gen Con :-)
this will make 30, 29 in a row.
I have been to every Indy Gen Con, did some seminars during the COVID Gen Con, and did a small pile of Milwaukee Gen Cons. I don't know the exact number. My oldest son is 34, he's been to 29 and I've been with him for all of those. So, mine is in excess of 30; I think I also have been to all the ones while he was alive (so, that's 34), and I think I went to between 5 and 10 before that. My first one was in the mid-80s, maybe 84 or 85.