Barebones simple example using new networking?

I'm looking to add multiplayer to some simple prototypes I'm working on. From the FAQ, it sounds like UNet won't be a workable solution if I find I eventually need to upgrade Unity beyond 2019.4. At the moment, the FPS sample is the only example of the new networking solution that I can find. Is there something much simpler so that I don't need to understand such a large codebase and project in order to pull out the few pieces I need?

For comparison, I found a very simple UNet HLAPI example -- from this thread, I downloaded move.zip:
https://forum.unity.com/threads/unet-sample-projects.331978/

The Assets folder is nearly empty, with two simple .cs scripts, three simple prefabs, and a simple scene. Looks like nearly all the code needed is in the scripts that come with the MultiPlayer-HLAPI package. The scene then just lets you control balls with arrow keys.

Is there something this simple for the new networking solution?

 

I wouldn't be surprised if the UNet HLAPI example you found works just fine with Mirror, with only the minor tweak of the correct "using" lines. This is because Mirror is a fork of Unet, and is currently supported unlike Unet. Most tutorials on Unet probably work with Mirror, and I've seen a lot of them.