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If you're using TypeScript + templateUrl, you won't get static checking of templates. With React + TypeScript, you will.

This is literally the only thing in our Angular2 setup that I'm really missing. Besides that, I've really enjoyed working with it (by way of Ionic 2)

Seems more like a tooling issue than language issue to me. Angular2 is much more immature than React. Let the IDEs/text editors catch up.