At least standard notes produce conflicting copies when collisions occur. Obsidian simply overwrites the old with the new, which makes it completely unusable to me. This is a non-issue if you always have reliable internet connection, but that's not always the case in practice. I don't like the way standard notes handles it, but at least I've never lost any notes with them.
> When Sync downloads a new version of a file, and finds that there are conflicts with the local version, the changes are merged with Google's diff-match-patch algorithm.
Based on the docs it doesn't sound like you can intervene in this process manually. Standard Notes creates a conflicted copy of the note instead, and that's what I'd prefer.
Sad that it seems like every notes app with sync seems to have at least one showstopping issue like this.
