In addition to what was said, Datomic Cloud automates a lot of the annoying and difficult to suss deployment for application dev, not just the database. You can

In addition to what was said, Datomic Cloud automates a lot of the annoying and difficult to suss deployment for application dev, not just the database. You can deploy large scalable apps in minutes and easily deploy new code in minutes with no down time (or architecting a deployment system yourself).