Applying WIP limits at the feature or team level isn't saying NO, it's saying NOT YET. The most common outcome is reduced lead-time, another way of saying more in the same period - you are actually saying YES to more. Don't let people feel like WIP limits are loss; it's gain.
“Next time you’re on a video chat, close any tabs that might distract you, put your phone away, and stay present. ... Remind yourself that the Slack message you just got can wait 15 min, you’ll be able to craft a better response after a video chat.” https://t.co/0KoZNmljB7
When talking about estimates, don't use words like "actually" or "really."
"How long will this really take?"
If we knew really/actually, we wouldn't be doing estimates.