The only use I can see is a future one: if ever the Sample Sound node or a similar one will allow realtime usage of an audio input (microphone, another software, an instrument, etc.), JACK will allow to route any input through that. I’m currently doing this in Blender using the external add-on AudVis, and it has a lot of potential for live, real-time music visualization using Geometry Nodes and EEVEE. It already works, even if currently it isn’t implemented natively. So, if anything, I wouldn’t close that door given that this could become a really cool future development.
Hard to argue here, finding this information can be a bit challenging at times.
I’m gonna go ahead and throw up a red flag here, license compliance is a legal issue, the platform module isn’t the place for such activities, we’ll happily assist with any tooling where possible but the responsibility for this has to lie elsewhere.