Cynical and selective...
This cynical selective disabling of Yahoo! groups means they can still harvest the email addresses used in correspondence... without the burden of actually having to invest in server space for content!
The eMail addresses actually have market value... which I'm sure they will continue to harvest.
The content, which was uploaded without any copyright recognition or controls, has NONE, and is therefor expendable.
With content removal as of December 14, 2019 rendering Yahoo! Groups useless to me; effective January 1, 2020 I will be notifying Yahoo!/Oath to delete any/ALL of my personal information, including email addresses, in accordance with the California Consumer Privacy Act (CCPA) https://en.wikipedia.org/wiki/California_Consumer_Privacy_Act
As a 15+ year participant in Groups; I don't ever want to hear from them again!
Richard - in California