Nan-in served tea. He poured his visitor's cup full, and then kept on pouring.
The visitor watched the overflow until he no longer could restrain himself, "it is overfull, no more will go in!".
"Like this cup," Nan-in said, "your desktop is full of documents and shortcuts. How can I show you Zen unless you first empty your cup?"
I'm a strange coincidence, the 500MHz band that 5G is using used to be used by TV channels in a lot of markets. The TV channels had to be moved to other frequencies.