[kvnhn]

I haven't used it, no. Around the time Git LFS was released, my read from the community was that Git LFS was favored to supersede git-annex, so I focused my time investigating Git LFS. Given that git-annex is still alive and well, I may have discounted it too quickly :) Maybe I'll revisit it in the future. Thanks for sharing!

[avar]

Neither is favored, git-annex solves problems that git LFS doesn't even try to address (distributed big files), at the cost of extra complexity.

Git LFS is intended more for a centralized "big repo" workflow, git annex's canonical usage is as a personal distributed backup system, but both can stretch into other domains.

In this case git-annex seems to have a feature that git LFS doesn't have that would be useful to you.