I will say that the majority of Rails apps can just use the Rails abstractions and they sit reasonably well on top of whatever database you choose to use. Rails

I will say that the majority of Rails apps can just use the Rails abstractions and they sit reasonably well on top of whatever database you choose to use. Rails 5 maps just fine to most common database types and patterns. On the other hand, in the past I’ve used Fog to abstract our cloud provider and that was nothing but pain. SQL is well-specced with some vendor-specific extensions, while there really isn’t any actual common denominator for cloud services.