Where is User Preferences?

Amongst the many features that have changed with newer versions of Blender is Blender User Preferences. Previously in Blender 2.79 -/+ the control panel window could be accessed from File » User Preferences. For Blender 2.8+/2.9+ this is now Edit » Preferences.

Design note: the User Preferences menu option is now just Preferences, the properties window now Blender Preferences instead of Blender User Preferences.

So far as the available properties, settings and options are concerned much of those from Blender 2.79 have been carried over with additional properties that accommodate the updated rendering systems, Look Dev and Rendered for real-time viewport rendering, and offline Eevee, Workbench and  Cycles engines.

Design note: updates to Blender now may mean a number of features and properties formally available have been removed or are now obsolete (typically included but de-prioritised), as a result opening old *.blend projects created in previous versions will likely work but may exhibit compatibility issues.

User Preferences is now just Preferences and can be accessed from the main Edit menu in Blender.

User Preferences is now called Blender Preferences but still provides access to all the applications underlying properties, options and settings.

User Preferences, now just Blender Preferences, have been moved from the main File to Edit menu.