Aggregating cypher queries are Eager...except when they are not?

Operators in detail - Cypher Manual and Understanding execution plans - Cypher Manual

So...even aggregating cypher-queries are not necessarily eager?

Is it possible to FORCE the query planner to use OrderedAggregation instead of EagerAggregation - to use lazy? With sth like "CYPHER query-option [further-query-options] query"
I know updateStrategy=default ("eagerly when needed") - but is there a UseCase where you would want to want to have them lazy? Or is it "only" possible to change the runtime-method?