Funding from a16z, no thanks, I don't see how this is what "comes after git" with git in the name and at the core, other than their cute wordsmithing throughout their copy.

Here's the thing, Ai is the future of most UX, that will be the entrypoint. Tools like this, while they have desirable features, will be subsumed into the Ai interfaces because we do more than code with them, and people want fewer tools, not more. Further, I suspect the entrypoints that win will be the ones that are extensible, i.e. your IDE like VS Code, Vim, and Zed.