Ceiling is 10 wins, floor is 9 wins.Tomlin has kind of been just "padding his stats" since the last 12+ win team he had in 2017.
He does keep "winning" in a literal sense, but the Steelers have had a pretty clear ceiling on what they can accomplish with Tomlin as coach for about 15 years now.
That's honestly way too long a time to realistically expect anything different anymore.