There are plenty of games on "absolute max settings" that will drop a 1080 ti below 70 fps at 3440x1440. You either do not have many demanding games or you throw around the term "absolute max settings" without really thinking much of it.
I am not truly sure. Can you list those titles? I must not have em. But with gsync almost every title I had when I played with the 1080ti it was cherry. Yea may be a few games. But at 3440x1440 it was damn good. It did have hard time at 4k but then I switched to gsync 1440p wideacreen. I did sell my 1080ti in anticipation of new cards. Until then playing my parents pro lol .