Comment by zbentley

That requirement seems ... uncommon. How many systems/industries have a frequent notion of transient/sliced views of history for their customers?

If that is a real requirement, it seems like it'd be easier to meet by giving customers a realtime-stream/log API whose history starts when they were most recently granted access, and providing them older historical events via a separate API of the classic "ask for a report and we'll get back to you within a day or two with an S3 presigned URL" variety, then synthesizing that huge historical report in batch code that's aware of the subtleties of the customer's visibility windows.