Any limitation on using macOS 10.12.6 to develop iOS?

[stt106]

From URL: https://flutter.io/setup-macos/
On the setup guide, it say flutter requires Xcode 9.0 or newer, I am aware that mac OS Sierra (10.12.6) works with Xcode 9.0 (though NOT with the latest Xcode 9.4).
So I am assuming it's sufficient to use 10.12.6 to do iOS development with flutter since it's compatible with Xcode 9.0; but since 10.12.6 is not compatible with the latest version of Xcode, I wonder whether there is any limitation on using it to do iOS development with flutter?

My hardware prevents me upgrading to 10.13 hence the question.

[MisterJimson]

You will eventually need a newer version of Xcode, especially when iOS 12 comes out.

What hardware do you have?

[github-actions]

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