Hello,
Yes, @G-MAGA is correct. ONLY the Sketchfab Store (marketplace features) have been shut down and merged into Fab for now. Everything else will remain on Sketchfab until further notice.
In a future phase of Fab, we want to offer more of the utility, community, and business features that you’re used to in Sketchfab. This will include the personal asset library use case. There’s no timeline yet, but it will make it to the public roadmap when we’re ready to share more information.