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I understand async/await are really just promises but I'm curious if there's a reason not to make all functions async and await all value for consistency?

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Is there any issues or implications to making all functions async? Are there any drawbacks?

This is for both Node.js and Client side systems (transpiled)

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For many functions, you just want a result, and you want it now. Why would you go through all the extra overhead and complexity of async?

In other words, yes there are implications: there is almost certainly going to be a performance hit; partly because the code will be more complex.

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since promises are part of the language and not a "on top" library or something similar, the runtime can decide to execute a promise immediately. there is not a performance hit in client computing rather than allowing your application to deliver steady 60 fps

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