What I took away from reading this article is that because the umbrella of "software development" is so wide; everything from a static html page for your local

What I took away from reading this article is that because the umbrella of "software development" is so wide; everything from a static html page for your local charity up to curiosity/ mars rover - it's not practical to define a single set of methodologies, tools and techniques that will work, be pragmatic or make sense for all situations. Do what you think is best for whatever it is you're building :)