You could label this a theoretical question but I consider it a design question. Is is possible to have a large RipNG deployment using multiple RINng instances and simulate OSPF like areas?
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Areas are a feature of the link-state protocols. Areas reduce the amount of topology information each router can see and needs to process.
RIPng is a distance-vector protocol. Distance-vector routers have no topology information past their neighbors, so there is no need for Areas.
You can have a large RIPng deployment. To reduce the amount of route updates, you should use route summarization. Contrary to OSPF, you can summarize routes anywhere, not just between the Areas.