how can we concretely think about “Complexity Budget” and define it in terms that can be leveraged and used to control the complexity of software dns ystems?
Not exactly on “Complexity”, more on UX, although I use this book as a reading material for design courses, on how finally the user receives all that complexity with tragic consecuences:
https://www.tragicdesign.com
And on that “complexity” that the user doesn’t see, usually I go with “Software Architecture: The Hard Parts”
https://www.oreilly.com/library/view/software-architecture-the/9781492086888/