[Question] What's advantages of tool.rye.dev-dependencies over project.optional-dependencies.<dev>?

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What problem it solves?
consider currently rye add --optional=dev black does the exact same thing as rye add --dev black

or is there any advantage I didn't understand?

[T-256]

helpful thread: https://discuss.python.org/t/adding-a-non-metadata-installer-only-dev-dependencies-table-to-pyproject-toml