Update source/index.md

Co-authored-by: Valentin Gagarin <valentin@gagarin.work>

Author: wamirez

source/index.md

@@ -54,7 +54,7 @@ Explanations of history and ideas in the Nix ecosystem
 
 [Nix](https://github.com/NixOS/nix) allows treating Unix processes and file system operations as pure functions.
 
-It is the basis of an ecosystem of exceptionally powerful tools.
+It is the basis of a growing ecosystem of tools that facilitate repeatable results in software development:
 [Nixpkgs](https://github.com/nixos/nixpkgs) is [the largest, most up-to-date software repository in the world](https://repology.org/repositories/graphs).
 [NixOS](https://github.com/NixOS/nixpkgs/tree/master/nixos) is a Linux distribution that can be configured fully declaratively, with unmatched flexibility.