I have some APIs I have to call that take up to 5 seconds to return and resist caching (hotel availability, for instance). Would those delays become even more jarring with an approach like this?
You pointed a good example of where this wouldn't work. However, you can still make everything else asynchronously fast; and use a loader when it needs to really wait for 5 secs.
For instance, take gmail. Some part might hard to use that way.. for instance, chat communication where you somewhat need to receive the answer of the other person to show it. However, adding labels, deleting a message, etc.. that can all be made asynchronously.
