Emacs - Software maintained for 50 years

Emacs is a text editor and began its development in 1970s ( released in 1976 ) One reason that paved its way all along is its extensibility architecture

Emacs is built around a Lisp interpreter, making it less of a text editor and more of a programmable computing environment. Users can modify virtually any behavior, add new features, or completely transform the interface without touching the core. This means Emacs can evolve to meet new needs without requiring fundamental rewrites - it adapts rather than becomes obsolete.

The community continuously extends Emacs through packages and configurations. When new programming languages, workflows, or computing paradigms emerge, Emacs users create packages to support them. This distributed innovation means Emacs stays relevant across technological shifts - from terminal computing to GUI environments to modern web development.

A software that is not easily modifiable become stale sooner than we can imagine.