What are the core elements of every good feature launch?

Feature launches can be a snoozefest.  If it's just a feature launching, is it worth publicizing this to the customer?   Every launch should have is a packaged story of WHY you're telling the custom

On average our PMMs sync with their PM counterparts on a weekly cadence. At Intercom the ratio of PMM to PM is usually 1:4. Quarterly meetings include roadmap review sessions (2-3), usually a few week