I like this a lot, but it represents a turning away from desktop technology (as in having a native editor as a desktop app) that just makes me say “no”.
It has an open-source format, you can create animations yourself as well. Plus this renderer is literally a desktop app, isn’t it? It is as cross platform as it gets, with this project being the most optimized implementation.
Just because it's open source and I can create animations myself (by hand) doesn't mean either solve the underlying problem that we are killing off desktop application technology.
Electrons gotten pretty good at the speed thing (or processing speeds caught up with it), but I can still feel the missing native elements and small touches that make native macOS apps a joy.