Why is missing field in missing query deprecated while it is still being used in missing aggregation? Syntax looks similar, yet one is deprecated while the other is not.
Missing query: https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-exists-query.html
Missing aggregation: https://www.elastic.co/guide/en/elasticsearch/reference/current/search-aggregations-bucket-missing-aggregation.html