I mean, what he did with Match and SunGirl was bad, but that's not what I was thinking.
The last time I heard about him in the comics (it's been a while), Wally trapped him in time/paralyzed him in time, and he's in the Flash museum as if he were a statue.
Oh, yeah, Wally stole his speed so he couldn't move and he was temporarily put up on display in the Flash Museum to torture him a bit. (He was forced to stare at a statue of Bart.) (These are the events of kind Flash: The Fastest Man Alive and All-Flash)
But he actually had more appearances after that. He was released from his paralysis/stasis by Hunter Zolomon during the FInal Crisis: Rogues' Revenge comics. That's when he had his whole Kid Zoom arc that no one likes, and then at the end of that series he was killed.
However, even more recently, Thad was actually last seen in the current canon (Prime Earth canon); The Flash (2016) #760. He's I guess kinda in the Speed Force at the moment. He hasn't shown up since then and that was specifically in 2020.
But getting back to what you were saying in your previous ask: Yeah!!! If there is any sort of friendship between them still I bet they'd both be mad for each other's sake. I'd definitely love to see them supporting each other as clones and just being there for each other.
It'd also be interesting to see how they react to each other being sorta on "different sides" since Thad's still villain adjacent and Match is looking towards being a hero and doing good. That would be interesting to see that intersection and how they might react to each other then.
