Just like Hahn just once in his career admitted to a mistake.
Hahn has owned the Tatis Jr. trade, calling himself a “jackass” in front of fans and telling MLB.com’s Scott Merkin, “That was probably the last deal we made with having a short-term mindset in mind. Ultimately when this thing gets right, we are going to once again have a shorter time arising goal with our trades. It doesn’t mean you want to make a deal that haunts you for the long term, obviously.” Every GM has a trade he’d like to take back. Around that same time, the Marlins traded Luis Castillo, got him back due to a medical dispute, and then traded him again in the offseason. It was also the summer where the Dodgers traded Yordan Alvarez, as outlined here.
Though Hahn admitted to Greenberg in 2017, “I probably physically cringe whenever I see a Tatis highlight,” the club embarked on what seems to have been a successful rebuilding effort after the ’16 season.
https://www.mlbtraderumors.com/2020/04/how-did-the-white-sox-trade-fernando-tatis-jr.html