I have been using legacy indexes (aka Lucene) to run queries like the following in Neo4j Cypher in order to go through millions of simhashes in realtime and find similar items:
START file = node:File("simhash:THE_SIMHASH_HERE~0.8")
RETURN file.name
Since Lucene indexes are being deprecated now, I wonder if there is a way to run similar queries on the modern Label-based indexes.