This would allow other systems to "catch up", asking "what happened since I last polled?".

The response would be limited to the new/changed records with their most recent values, which would make synching data to other platforms easy.

There are plenty of multi-platform users out there who could cut costs with this feature or something equivalent.

I think the best way to implement this depends on how data is stored in your systems at the moment… If you're not already using an event stream or audit trail, perhaps a clever use of "last_updated" fields can achieve the same result.