When a filter matches too many actions after it has been changed it is "throttled". The most powerful actions are disabled. This is to avoid many editors getting blocked when an administrator made a mistake. The administrator will now get a notification about this "throttle".
The Reply tool has been deployed as an opt-out preference to all editors at the Arabic, Czech, and Hungarian Wikipedias.
It is also available as a Beta Feature at almost all Wikipedias except for the English, Russian, and German-language Wikipedias. If it is not available at your wiki, you can request it by following these simple instructions.
Research notes:
As of January 2021, more than 3,500 editors have used the Reply tool to post about 70,000 comments.
We have preliminary data from the Arabic, Czech, and Hungarian Wikipedia on the Reply tool. Junior Contributors who use the Reply tool are more likely to publish the comments they start writing than those who use full-page wikitext editing.[10]
The Editing and Parsing teams have significantly reduced the number of edits that affect other parts of the page. About 0.3% of edits did this during the last month.[11] Some of the remaining changes are automatic corrections for Special:LintErrors.
A large A/B test will start soon.[12] This is part of the process to offer the Reply tool to everyone. During this test, half of all editors at 24 Wikipedias will have the Reply tool automatically enabled, and half will not. You can still turn it on or off for your own account in Special:Preferences.
During Talk pages consultation 2019, editors said that it should be easier to know about new activity in conversations they are interested in. The Notifications project is just beginning. What would help you become aware of new comments? What's working with the current system? Which pages at your wiki should the team look at? Please post your advice at notifications-talk.