The league went from "KD's gonna get the biggest package ever received for an NBA star player" all the way to "how do you feel about our team's 4th best player and a couple draft picks?"
Both sides got stuck. The Nets couldn't trade him for that kind of package, and KD wasn't gonna blow his age 34 season pulling a Simmons or Harden, he's too old to try that approach. Can't just torch a year of his career trying to force a trade.
So now he's back, and that team may actually be really good! If Irving and Simmons actually show up and play. Harris and Warren back healthy. They have some talent.