We don't use alt_address fields and therefore I wanted to update the PII on those fields to remove them from the "View Personal Info" screen on Leads and Contacts.
When I did so, it kept Alt Address Line 2 and Alt Address Line 3 fields.
I had to update those via code in the extension framework in
because they are not individually available in Studio to update.
It would be nice if updating the PII flag on Address Street actually updated all those.