Earlier quoted context omitted.
Is the title really accurate though. They never made a public announcement saying they would do this. Someone just leaked an internal discussion and it blew up. A lot of things get discussed and evaluated that never eventuate.
The code they wrote for doing this has been public all along: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/85689
This is the first time I'm seeing this merge request, no one reporting on this even mentioned it.