On: Big things to expect from Emacs 25

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While others have mentioned UI changes, I want to highlight recent core improvements. Emacs Lisp is now a much better language. In particular, we have:

* lexical scoping and fully correct lexical closures

* cl-lib integrated into core

* a package manager

* Common-Lisp-style generic places (i.e., setf support)

* A much better advice system (add-function and advice-add)

* A very good testing framework, ERT, and a test suite that uses it

Emacs is a much nicer development environment than it was ten years ago.