XenForo 2.1 includes a large number of new features and improvements, including:
Native push notifications on supported devices/browsers
Editor button management
Enhanced editor integration and advanced BB code option syntax
Markdown support
Tables
Reactions
URL unfurling
Emoji enhancements including an improved smilie menu with easy emoji access
Video uploads
Approval queue improvements
Guest performance improvements including guest page caching
Content bookmarking and sharing
A fully featured REST API
One click XenForo upgrades and easier add-on installation
BB code and rich text editing for profile posts and comments
And much more!