Seems like all G Suite users are now forced to the new design with no option to revert.
https://trends.google.com/trends/explore?date=now%207-d&q=old%20gmailAccording to Google’s handy Trends tool, this has lead to a sad, but humorous spike in searches for terms like “old gmail” and “change gmail back to classic” in the last 48 hours.
https://medium.com/@boriscoder/peeki...l-dd84b532e0f5
Gmail performance score is 2 out of 100