Fleury had a no-trade clause and Murrey wasn’t eligible for the expansion draft (on his first contract). Pittsburgh could have picked a goalie up to expose and kept both Fleury and Murrey.
Seeing how Fleury has been playing, he looks happy in Vegas.
If the Penguins would have got a goalie to expose during the draft, they would still have Fleury.
DaveK and his other identities have to be upset that they let Fleury get away.