Look at the guys he was KOing though: Lewis, Sakai, Hardy, Struve and Hunsucker (lol).
There's no reason to believe he wouldn't be able to beat those guys again right now, maybe Lewis could be an exception since he carries fight changing power, but other than that you can see that every matchup Tai got in that streak was favorable to him.
Going from that to Gane, Pavlovich, Volkov and even Tybura (had some rough losses but is pretty consistent now) is a stern test for someone as limited as Tai.
He's also turning 31 this year, which for HW is pretty young. He's not past it, he's just fighting better fighters