Github user StefanRRichter commented on the issue:

    https://github.com/apache/flink/pull/3508
  
    Very good work and thanks for improving the documentation. I like the 
update. From what I have seen in the past, some user have mistaken the 
list-nature of the operator state and simply dumped lots of small elements in 
the list, that should not actually be the unit of repartitioning and sometimes 
even logically belonged together. I wonder if the different semantics in list 
state between the operator state and the keyed state can be confusing and 
error-prone for users and what we could do about this? A method called 
`getListState` might be a step in the wrong direction.
    
    Besides this, +1 from me.


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