It is possible to write code to add a compatibility layer on top of any DB to make it work like any other DB. Foundation DB's architecture specifically accounts

It is possible to write code to add a compatibility layer on top of any DB to make it work like any other DB. Foundation DB's architecture specifically accounts for this. It was designed from the ground up to allow building different interfaces/layers. We can write compilers for any language to compile it to Python bytecode. That does not make python VM and .NET CLR the same thing. CLR clearly has a design goal of allowing multiple languages to run.