Opinion: people who staunchly prefer working with Gerrit, and consider anything else inferior, really love working with git-review. And if git-review were not Gerrit specific they would be just as happy with, say, GitLab.
The process that the git-review/Gerrit combo automates/enforces (one commit per change, automatically generated topic branches, change IDs with cross-project uniqueness) could also work just fine by hooking up git-review with the GitLab API.
