When set to "Try" QueryFuzzy should try to Fuzzy searches on Elastic without making staff and patrons always add a ~ after each search term. Elastic has support for fuzzy search https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-fuzzy-query.html
+1 This is especially helpful in Authority searching.
Would query fuzzy work to help with plural searches book has results books does not? This comes up often. There is a bug in 27515 too.