This question is similar to the closed topic User preference for default home page, but it’s still not clear to me. I originally set the default home page to Categories, by placing it first in the list. If I now (two months later) change the default to Latest, what will happen? I can see two possibilities:
Everyone who has not explicitly set their User Preferences currently has a null, or empty setting, so they will see the new default setting of Latest.
Everyone’s User Preferences were filled with Categories- the default at signup time- so they will still see Categories. Changing the default now will only affect new users in the future.
Which one is it?