When comparing Gnome Builder vs GNU Emacs, the Slant community recommends GNU Emacs for most people. In the question“What are the best IDEs for C++ on Linux?” GNU Emacs is ranked 4th while Gnome Builder is ranked 16th. The most important reason people chose GNU Emacs is:
Licensed under GNU GPL.
Ranked in these QuestionsQuestion Ranking
Pro Great language support (for linux based projects)
Pro Integrates nicely into the GNOME Desktop Environment
Client-side decorations, good use of widgets.
Pro Terminal built in
Fully featured terminal is packaged.
Pro Integrated debugging
Pro Extendable through plugins
Pro Lovely find and replace tool with great REGEX support
Shows a live feedback of what matches the pattern/criteria entered.
Pro Supports versioning (git)
Shows diff indication and has branch integration too.
Pro Tiling Editor capability
Pro Integrated system-wide profiler for improving software performance
Good templates available to build applications, even to build gnome applications.
Pro Completely free
Licensed under GNU GPL.
Pro Keyboard-focused, mouse-free editing
Emacs can be controlled entirely with the keyboard.
Pro Infinitely customisable
Customizations can be made to a wide range of Emacs' functions through a Lisp dialect. A robust list of existing Lisp extensions include the practical (git integration, syntax highlighting, etc) to the utilitarian (calculators, calendars) to the sublime (chess, Eliza).
Pro Works in terminal
You can use Emacs' command line interface or graphical user interface.
Pro Self documenting
Emacs has extensive help support built-in as well as a tutorial accessed with C-h t.
Pro Has turn-key packages for IDE work
Packs like spacemacs make it easy to get started and bring the learning curve down from an infinitely regressing spiral to something more manageable.
Pro Works over SSH
Pro Great Integration
Emacs has modes for nearly every use case, even ones like mail and internet browsing. It has often been said that Emacs is essentially an operating system on its own.
Pro Has Vim emulation
Evil-mode makes Emacs actually usable as an editor.
Con No project management
Because it is still in early development there are little project management functionalities.
Con Learning curve is steep
While it's better than it used to be, with most functions being possible through the menu, Emacs is still quite a bit different from your standard editor. You'll need to learn new keyboard shortcuts.
Con Not set up as an IDE by default
Requires customization to get IDE-like features. Luckily a few features such as compilation, debugging, and syntax highlighting are included.
Con Non-standard keyboard commands
I'm editing this in Chrome, but I could be using Firefox, Edge, or any other browser, or Notepad, or even Libreoffice or Microsoft Word, and in ALL of those cases, keys would work exactly the same way, including how to jump around by word, select words, cut/copy/paste, etc.
Pretty much all modern editors share the same basic key combinations, from Visual Studio to Sublime to Atom to VS Code to Xcode. Becoming an Emacs expert means you need to mode-shift between code editing and editing in your browser; adding Emacs modes to SOME apps means you need to remember which key bindings to use where. The cognitive load added by switching between Emacs and other text editors is not worth it, especially since all the advantages of Emacs are now available in free editors elsewhere.
Con A UI designed before anyone had a clue about UI design
Emacs is positively NOT a well-designed user interface. Its design dates back to the time when all microwaves still needed instructions and VCRs universally displayed a flashing 12:00 because no one could figure out how to operate them. Many modern editors have 100% of the power of Emacs with none of the hassle.
Con Chorded keyboard combinations can be baffling
For example, for navigation it uses the b, n, p, l keys. Which for some people may seem strange.