Shallow clone support in v3.0 and beyond?

Hi,

Askar Safin <safinaskar@zohomail.com> posted on the ML about his complaints regarding grafts removal in v3.0+ (see [1] for the full thread). He also briefly mentioned future of shallow clones (aka git clone --depth=1).

The question is: If grafts support is removed, then how can shallow clones be implemented in terms of git-replace(1)? What about its implementation details? How about unshallowing (git fetch --unshallow)?

Thanks.

[1]: https://lore.kernel.org/git/198c29e9058.119e3a5c065010.5888624019176274871@zohomail.com/T/#t