It didn’t even add that. You can put custom fields into userdb. It just standardized that, right next to other standard optional fields like full name.
Out of all the steps that happened, this one should be the least controversial, but some people see systemd and start the heavy breathing.
I found it extremely funny when people started asking for systemd replacements, of all things, after systemd added the ability to store a birth date.
The author of the PR explicitly says IT IS TO COMPLY WITH THE NEW TRACKING LAW (LOBBIED BY FACEBOOK/META).
It didn’t even add that. You can put custom fields into userdb. It just standardized that, right next to other standard optional fields like full name.
Out of all the steps that happened, this one should be the least controversial, but some people see systemd and start the heavy breathing.