The number one thing that gerrit does that is important is keep comments tied to the code between commits.
By which I mean the discussion doesn't get broken between changes, and it makes it far more trivial to iterate on things in the review without breaking the discussion. And for the reviewer to see what's changed between revisions at the specific comment point they're looking at. And then have a nice clean commit at the end instead of some dogs breakfast of merge commit with revision commits shoved in it.
The number one thing that gerrit does that is important is keep comments tied to the code between commits.
By which I mean the discussion doesn't get broken between changes, and it makes it far more trivial to iterate on things in the review without breaking the discussion. And for the reviewer to see what's changed between revisions at the specific comment point they're looking at. And then have a nice clean commit at the end instead of some dogs breakfast of merge commit with revision commits shoved in it.