Vertx is polyglot, you can use js and npm if you like, so in this respect vertx can be more productive as it allows you too use the tool that works best for you

Vertx is polyglot, you can use js and npm if you like, so in this respect vertx can be more productive as it allows you too use the tool that works best for your problem, be it npm, maven, gradle or language: java, javascript, kotlin, etc...