In general, we wouldn't recommend using gremlin at all, preferring cypher for a lot of reasons related to ease of use and performance
@david_allen I just want to mention that Gremlin isn't just an alternative to Cypher, it's also an interface.
For example, there's software (this list contains some) that works with any gremlin-enabled graph data source. Meaning that if neo4j supports gremlin, then you can use all of this software on your neo4j data!
@amerharb This github issue tracks neo4j 4 gremlin support, you may go upvote / send a PR!