Yeah I mostly agree with this. I'm mostly talking about git the model, rather than git the tool when I say git has solved the problem of asynchronous decentralized collaboration.

For local-first async collaboration on something that isn't software development, you'd likely want something that is a lot more polished, and has a much more streamlined feature set. I think ultimately very few of git's chafing points are due to its model of async decentralized collaboration.