I love k9s, it's completely changed the game for me. I really wish the keyboard shortcuts and available commands were better documented, though. Figuring out that you have to be in the deployment view (and how to get there) to scale something took some doing.
This really rings true! We had an outage that was essentially due to errant use of the keyboard shortcuts and default read-write settings in k9s. "Bye bye super important deployment" is a bit too easy.