title: Why does Spring not provide reactive (non-blocking) clients for relational databases?
body: <p>I've used <a href="https://vertx.io/" rel="noreferrer">Vert.x</a> toolkit for creating reactive applications with support for relational DBs like <a href="https://vertx.io/docs/vertx-mysql-postgresql-client/java/" rel="noreferrer">MySQL and Postgres</a>. I know Spring provides reactive support for some NoSQL DBs like Cassandra and Mongo but are they willing to provide the same for relational DBs?</p>