Automatically reload modified images/textures
Export Triangulate "Keep Normals"
Proper detailed render statistics
Option to use 3.x-style [Shade Auto Smooth] in 4.x
Modifiers collections
Modifier Layering System
Modifier menu "favorites", "last used"
Option to use pre Blender 4.1 auto smoothing
Boolean system performance optimizing
UV Unwrap along one axis
Activity