Better submodules and LFS?

[Timmmm]

Hi, I was just wondering if jj is going to try to do something better than submodules and LFS. In my experience these are the two biggest problems with Git. I've listed all the problems with submodules here. LFS has similar UX problems: files aren't automatically downloaded, you cant choose the file storage method independently of the actual file content, in general it's a hacked-on-the-side solution.

I guess you are somewhat constrained by trying to maintain Git compatibility, but if you could solve either (ideally both) of these problems in a better way than Git (wouldn't be hard!) then I think that would be a huge reason to use jj.

It would be a shame if jj just blindly copied Git here.

[PhilipMetzger]

See #2865 and #2919 for some ideas, these should be possible with a native backend