Thanks for bringing this up!
Yes there has been many updates to the design system since then. I’d say very few (if any) were visual updates that would be reflected in the sketch file. I’ll investigate any potential changes we need to make and load an updated sketch file if need be!
I’m not a designer or anything but I have seen a demo of abstract. I agree thought it’s definitely worth looking into and will help us version control our sketch files and make things easier for the community/contributors. We are also currently looking using our react components to generate and version control our sketch files. Watch this space!