There is a conversation going on here about consolidating constructive and progressive buttons: https://phabricator.wikimedia.org/T110555
I want to find out if any of you have used these buttons in your interface and have done any testing with your users to see if they understand the difference between the two. Also, if you have used it in other ways that has been helpful to your users, chime in!
Progressive (blue) conveys to the user that they are starting or continuing a multi-step process. Constructive (green) conveys to the user they are completing a single or multi-step process. In most case Constructive color shows the user what will happen. In others it is feedback that the action has completed. For example, thanking a user, adding a page to a watch list.
-- Related discussion about button consolidation: https://phabricator.wikimedia.org/T110565
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