New navigation module. Replaces Admin Toolbar.
Some outstanding UX issues.
The new Navigation module and Layout Builder
New Navigation in core as an Experimental module
Issues
[PLAN] New Navigation and Top Bar to replace Toolbar Roadmap: Path to Stable
[Plan] Administration main navigation modernization
New “content creation” menu proposal
Improve administration navigation
Providing additional methods of navigating the admin interface
Support Deeper Navigation Levels
Additional modules
Core module