This was quite helpful. Thank you.
One further question is how the living constitution theory applies to things outside the constitution.
On the conservative side, the arguments on originalism and textualism aren't limited to the constitution, but in determining the meaning of various statutes (Gorsuch's majority opinion on employment discrimination was based on his understanding of the text of the 1964 Civil Rights Act.)
How does the living constitution approach consider legislation? Is legislation also living, or is that something that isn't the role of the courts the way interpreting a document that hasn't been formally amended during many of our lifetimes is?