Since this will be a significant change to the core of the messaging experience as it relates to threaded replies, onboarding is an important consideration.

...

Important Links

Phase 2 Onboarding

In-product notices

Leveraging the new in-product notices, we propose the following notices for phase 2:

Admin feature promo

For admins-only, this in-product notice will promote the new feature when it’s available. This is to encourage admins to turn on the setting at the system level to make it the default for users in their workspace.

...

For users who have had the threads feature turned on for 10 days, we would like to prompt them for feedback on the experience. An in-product notice will be used for this purpose as well.

...

Phase

...

3 Onboarding

In-product notices

Same as phase 1In phase 3, we’ll use a custom notice for the End-User notice. Clicking ‘Next’ from this notice will advance to the Tour below.

Tour

Another method of guidance we’re proposing is a guided tour of the UI elements that relate to the new threads experience.

...