I’m in favor of WordPress collecting more anonymized usage data that could help make informed decisions on changes or improvements to core, such as tracking changes to the WordPress user interface, which buttons or settings are used most often, etc. A good example of when this data could have come in handy is the recent removal of the justify and underline buttons from the editor in WordPress 4.7. During the discussion on whether they should be removed or not, a number of people questioned if there was any user data available that would indicate how much they’re used and help gauge the impact of removing them.
The only data available to help make an informed decision was provided by Mel Choyce. Choyce shared statistics from WordPress.com and its variety of editor interfaces that indicated Bold, Italic, and Links are used the most while Lists and Blockquotes are the second most used buttons.
The Center and Left alignment buttons are used often, but the data doesn’t determine if people are using them to align text or images. Information on which headings are used most was not available. The team did not have any usage data specific to the WordPress core editor.