Certainly use whatever tools you like, however emacs and Sublime Text cannot be compared directly to one another.
Sublime Text and Vim or some other text editor can be, however text editing is a small component of emacs' utility to its users.
The reason is that emacs is an environment for running emacs lisp applications, and those target pretty much every imaginable niche.
There exists decades of development in that vein for emacs to the extent that for some domains it is an entirely self-contained ecosystem for that space.
The environment homogeneity is distinctly different from any other app which targets a subset of the tasks associated with an overall workflow; if we narrow the domain to just development a possibly valid comparison would be Visual Studio because of how the environment absorbs every interrelated aspect of development from communication to debugging etc. within one overall application.
Light Table may one day be similarly versatile though and a possible emacs alternative.
