It is useful to know for tech support purposes if rendering is using a HW accelerated pipeline or the software pipeline.
E.g. Scene Builder about box provides this information:
JavaFX
Toolkit = QuantumToolkit
Pipeline = D3DPipeline
Hardware acceleration ENABLED

But as Kevin wrote on openjfx mailing list:
Most of these are internal details that we would not want to provide via public API, but knowing whether it is running as HW versus SW is helpful, as long as it is exposed as some sort of capability rather than a specific pipeline name.