I previously clicked, “yes,” and it didn’t apply to new users. Maybe it’s either/or (historical/going forward)?
However, if all users are already watching the first post of the category and then I reset that setting (so default categories watching first post is empty again), then I re-add the category to default categories watching first post, I don’t receive this prompt.
Anyways, if I selected “No, only apply change going forward,” this wouldn’t work because some users would be left with the wrong watch level.
The setting is for new users and gives the option to apply it to existing users.
Let’s say you set General as a category.
If you select “No”, only new users will watch the General category.
If you select “'Yes”, existing users will have their preferences updated , and new users will watch the General category. The “yes” is a one-time update – you still have General category set, and it will work for new users.
That’s because you hit “No” in both times. It means nothing changed, and everyone still watches that category. There would be no point in bringing up the modal to ask you if you want to update existing users.
Does that make sense to you?
Important nuance by Jammy below: Just a small qualifier, it will update the preferences for anyone who hasn’t already specifically set one. It will change the default, but not override a user’s deliberate choice. ↩︎