Niri is so good. The spatialized layout really keeps me aware of where I need to go.

I do wish it had virtual outputs though. Such that we can either combine screens to form a big monitor, or subdivide a screen to make multiple outputs. I have been doing some coding on a 42" OLED tv, and I really want both a side tray and an overhead output. There's stilch which does this; I wonder if River is capable enough to do something similar. https://github.com/wegel/stilch