Allow SQL databases to exist in a resource group different than the SQL Server
The idea here is that I would like to have multiple databases in different resource groups, but one server to hold them all. The server would be in its own resource group.
This is possible with App Service and App Service Plan.
Andrew Boothman commented
This is particularly important as without being able to share a SQL Server between resource groups, you can't share an elastic database pool between resource groups, meaning that you miss out on the potential money saving that an elastic pool could offer