The drawbacks of mold are: - It's linux only (macOS support WIP) - It's still somewhat experimental. It may not be able to link everything. There may be bugs.

The drawbacks of mold are: - It's linux only (macOS support WIP) - It's still somewhat experimental. It may not be able to link everything. There may be bugs. Having said that, it's written by someone with a lot of experience writing linkers (they previously worked on lld), can link codebases as complex as chromium, and generally seems to work well for most use cases. A common pattern would be to use mold for development, and then the regular linker (varies by platform) for release builds.