There's much love given here to Flash as a creative tool and as an on-ramp for UX engineering. Both well-deserved, and both reason-enough to support Bill's project.
One aspect that Flash got uniquely right was the ability to push and pull on vectors like clay. It's the only vector editing tool I've ever used that didn't concern you with bezier abstractions and just let you directly manipulate them.
I don't know what algorithms were that enabled that, but I hope that's part of this tool too!
Curious if C# is the right language for an ActionScript revival. Feels like a strange choice considering ActionScript was the TypeScript of its day, but perhaps the prevalence of Unity now and the ability to share tech with the tool's C# codebase makes it a reasonable decision.