My email signature has been this quote from Dune for quite some time:

"Once men turned their thinking over to machines in the hope that this would set them free. But that only permitted other men with machines to enslave them." - Reverend Mother Gaius Helen Mohiam

"... who used their idle waiting time to improve the system for everyone."

Thank you for calling out that it should be done in idle time! It's very easy to be working on something, see some issue or inefficiency, and get tempted to fixing it there and then because "It'll only take 5 minutes" 😅