Emacs is a collection of separate Elisp programmes that all cooperate and share data structures. You would not call Unix tools un-UNIX-y only because they all

Emacs is a collection of separate Elisp programmes that all cooperate and share data structures. You would not call Unix tools un-UNIX-y only because they all share procedures from the C library. Emacs also interfaces with external processes (e.g. using comint mode). It's the ultimate bottle of glue.