@txp1 I am one of the people you mentioned who is returning to a Node because of the app. I sold my Node 2i and moved to a miniDSP SHD with the Volumio app/ OS. Volumio was a very bad experience, completely overshadowing any SQ improvement from the SHD hardware. As a result I am very wary of streamer software/UI/app quality. Improvements in SQ are useless if the user experience is degraded.
I have a Peachtree Gan 1 on order and it comes with a new Node. I'll look into the Node upgrades (LPS) mentioned in this thread. Someday I'll move up, but I will take my time - and pay close attention to the app. Best of luck.