Some of the ideas we've built into Prisma are certainly inspired by tools in other languages and we've looked a lot at LINQ and the C# ecosystem in general as we designed Prisma!
However, I believe that one thing that sets Prisma apart is the architecture with a _query engine_ [1] (implemented in Rust) that takes care of query planning and execution on top of which we can add lightweight, language-specific layers to bring Prisma Client to more programming languages. But you're definitely right that a generated database client is not a novel idea per se!
For example, we're already working on Prisma Client for Golang which is already available in alpha!
[1] https://www.prisma.io/docs/reference/tools-and-interfaces/pr...