Make the terminal buffer editable
I'm coming after seeing this while learning about Plan9: https://youtu.be/dP1xVpMPn8M?t=15m26s
The ability to rewrite the buffer like in acme seems like a really neat feature to take notes on the terminal output directly without having to copy-paste all the time. I suggest to make it toggleable both per-terminal and as a global default which should initially disabled, so it isn't disruptive within more common workflows.
Good idea or nah?