October 8, 2018
The new Gmail experience was launched earlier this year with an opt-in option. Soon after October 16th, 2018, new Gmail will become the default experience, and anyone who previously opted out will be automatically migrated to the new experience. Users will no longer be able to toggle back and forth between the classic and new versions of Gmail.
Additional resources:
- Learn more about What's New in Gmail
- Top new Gmail features
- Gmail Learning Center