Microsoft has introduced a new Extension Manager for Visual Studio, starting with the 17.8 Preview 3 release. This new Extension Manager adopts a 2-column interface instead of the previous 3-column layout. The leftmost column, which used to separate extensions into Installed, Updates, and Roaming categories, has been replaced with tabs at the top. This change allows for more content to be displayed within the extension space.
In addition, Microsoft has made improvements to the category system, filters, and search functionality of the Extension Manager, ensuring better management of a large number of extensions. This resembles the extension manager in VS Code, but with some differences.
Furthermore, Microsoft plans to add a way to install extensions through a vsconfig file in future versions.
TLDR: Microsoft has released a new Extension Manager for Visual Studio, with a more streamlined 2-column interface and improved category management and search capabilities. They also plan to introduce installation via vsconfig files in the future.