I seriously hate that the default #uxn rom is a launcher, a way that only lets you launch pre-made programs.
I found this excellent comment the other day that explains this better than I could:
"Early computers were designed from the ground up to be truly general purpose. When you turned them on, you'd be presented with the word READY, and a blinking cursor. It was an open invitation to PROGRAM the machine! This is no mere appliance, it's a beckoning gateway to intellectual discovery!"