Comment by linsomniac

Answer about syncthing: I probably would set it up on only a portion of my home directory, not the whole thing, so it wouldn't impact home-manager/SOPS. However, Claude pointed out this potential issue: the bulk of my "projects" directory (my most active directory) is git repos, and (a) those are likely to conflict on both ends (a git pull on both ends), and (b) much of that syncing git can handle (except, of course, uncommitted changes).