Looking back, there's little argument to make that the trade for Norman Powell was the biggest move made by the Miami Heat this offseason. But it's hard to imagine how it would've all come to fruition without the sign-and-trade of Duncan Robinson, which gave Miami the room to make such a splash.
From a financial perspective, the little cap space that the Heat were able to make by moving Robinson to the Detroit Pistons (in exchange for Simone Fontecchio) opened the door for the Powell trade. While there weren't many fans of the Robinson sign-and-trade at the time, it's hard to be completely upset about it after the Powell transaction that followed shortly after.