I did talk to one of the Movecraft devs around the time of the DMCA, and a sponge port of Movecraft was a possibility. That was abandoned when Spigot resurfaced.
However, there’s been some interest in Movecraft for Sponge, I believe @MicleBrick was trying to get something similar up and working here: Spigot vs Sponge in terms of block update speed
I for one would love to see Movecraft come to Sponge - but it’s a lot of work.