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none of the issues i described are different now. RN on iOS still uses JavaScriptCore by default, Android uses Hermes, and it still uses V8 if debugging, meaning it's possible you'll have some super weird edge case bugs. in Airbnb's situation i believe they said it was almost impossible to pinpoint the issue due to the differences in these engines. it's unlikely, but still an unavoidable thing that could be a serious roadblock

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Hermes runs on iOS now and besides missing Intl, I’ve not had any problems with it and flipper let’s you debug hermes.

I've done and ran 2 medium sized apps on both iOS and Android and have never ran into such problems. While not impossible, that's akin to saying that if you run the JVM on MacOS vs Linux, there's a chance of different behavior. Possible, but unlikely. It shouldn't be a show-stopper for most situation.

ehh, not really. JVMs are all developed under the same roof but JS engines are a little more distributed and the spec has a little more room for interpretation. i agree it's unlikely, but still not ideal

Yes, fair enough. Not a perfect analogy.

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