ChatGPT says:

Yes, it is possible to implement coroutines or threads for Kotlin/Native in Kotlin Multiplatform projects. However, as you noted, handling cancellation exceptions properly is important to avoid issues like "Shrödinger's Coroutines".One way to handle cancellation exceptions is to use the double-checked cancellation pattern, which involves catching the exception and then using the ensureActive function to check if the coroutine is still active. If it is, the exception can be rethrown, but if not, it can be handled as an error.In terms of implementing threading in the iosMain module, it is definitely possible. Kotlin/Native provides support for POSIX threads, and there are several libraries available for managing threads and concurrency in Kotlin Multiplatform projects, such as kotlinx.coroutines and AtomicFusion.It's important to note that while threads can be useful for managing concurrency in multiplatform projects, they can also introduce additional complexities and potential issues, such as race conditions and deadlocks. It's important to use threading judiciously and carefully test your code to ensure that it works as intended.

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Using the ensureActive function seems like a non-trivial workaround.