The change in interface is coming – Part 2

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Following-up the announcement by the user experience team on March 25, the default user interface of Wikimedia Commons was switched to the new user interface on April 5th. The feedback from Commons users is found here. The majority of logged-in users of Commons continue using the new user interface, while about 9% of logged-in users switched back to the previous interface. After the switch was made to Commons, Ops team has determined that extra system resources is recommended for precautions as transitioning to the new interface while supporting the existing interface can tax the cache system severely. The new hardware is being installed, and we have a scheduled date for switching the user interface of English Wikipedia.
The default interface switch of English Wikipedia will take place at 5:00am UTC on May 13. The deployment process is expected to last for two to three hours.
Maintainer of user scripts, style customization and gadgets are recommended to review the previous post that describes the impact of these changes on bots, scripts, and gadgets interfacing with Wikimedia projects
We are building a frequently-asked-questions page. Will you help to compile the topics you find missing by posting topic ideas to the discussion page? We want to make sure that we provide answers to anticipated questions.
We plan to conduct wider outreach about the upcoming changes to our global user base in the coming week, which would likely include press outreach, blogging, and developing more public-friendly questions and answers. We’ll share more info soon on the Wikimedia blog.
Thank you for your interest,
Naoko Komura
User Experience Programs

Archive notice: This is an archived post from, which operated under different editorial and content guidelines than Diff.

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is the “9% of logged-in users switch back” based on the currently active users, or on the total number of account of commons ?

@Darkoneko The ratio is calculated from users switched back to Monobook over logged-in users who had activities such as edits, uploading files and etc, during the same period of time. More detailed summary of feedback from Commons users is found here.
We just ran the monthly query since April 5th, and the switch back ratio is about the same, 8-9%.