Puzzle #6: Thremeless

This puzzle was inspired by Quiara over on the Crosscord, who shared this grid with no three letter entries. 4-Down was my seed, as I'd watched it recently on the Criterion Channel's Afrofuturism playlist. I initially hit cluers block and had trouble coming up with anything interesting, but I came back to the puzzle a bit later and was able to make progress. I'm particularly fond of the clues for 9-Across (set a reminder for 8 years from now!) and 10-Down, and I was excited to include the very timely clue for 38-Across.