I don't see it: it's all exactly the same. If your performance goal is not achievable in time required for live processing (whatever you decide that to be), yo

I don't see it: it's all exactly the same. If your performance goal is not achievable in time required for live processing (whatever you decide that to be), you just relegate to a background job and then it's the same as any other batch job. Sure, this is a slight complexity on top, but it's such a common and well known pattern that it doesn't really add any practical complexity after you do it once. It's a fallacy to think that it's any different.