so what happened to 16-seeds at the slams in 2019?

Roger Federer welcomes the change to 16-seeds from 32-seeds for the Grand Slams in 2019. The Australian Open still has 32-seeds. So what happened?

https://www.forbes.com/sites/daniellerossingh/2017/11/21/roger-federers-wish-is-granted-as-tennis-majors-go-back-to-16-seeds/