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Two way bindings are awesome for demos.

They tend to introduce a fair amount of unnecessary complexity in real world applications. Especially if you have to deal with changes that don't happen in real time or intermediate states or two different formats of presentation for the same data.

The workaround for two way bindings in React is relatively easy compared to the kind of hoops you have to jump through when you start with two way bindings and have to backtrack because of pesky real world requirements.

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