You can leverage your existing SQL Server experience because this is the same SQL engine, which can be fully deployed in minutes.
An Arc-enabled SQL MI is the same evergreen Azure SQL MI engine that is compatible with any production release of SQL Server database engine in your on-premises environment. An Arc-enabled SQL MI combines the best and most widely used RDBMS, SQL Server, with the declarative power of Kubernetes. Many features and services that you already use with SQL Server are ready and available. A few features are still being enabled, but this is a very short list, anticipating the support of these features being enabled over time.
For more information, see Features and Capabilities of Azure Arc-enabled SQL Managed Instance.