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Both OpenGL shader code and on-device ML can be done in React Native. However, you likely won't reach full native performance today.

https://www.youtube.com/watch?v=1HYnrdKEVMU https://www.youtube.com/watch?v=LbcuLfrt8XA https://heartbeat.fritz.ai/image-classification-on-react-nat...

You're right there will always be a very high demand for native engineers to build the underlying bridge code to back these capabilities. As cross-platform tools gain new bridged capabilities and become faster (https://engineering.fb.com/android/hermes/), as they have been slowly, I think the use-cases where using something like React Native or Flutter is possible and makes sense will grow.

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