We have or rather could have data and metrics. We just tend to ignore them outside of specific domains.
For example, from glancing at this summary and table of contents, it seems like there’s no to little mention of performance metrics. What is architecture good for if it doesn’t account for what the computer actually does?
Even in terms of development productivity or UI: why don’t we have mathematical models to decribe the mental stack one needs to develop, change, extend and more importantly use software?
Why are compute resources (human or machine) rarely a consideration when they have a real, measurable impact on interacting with software as developers or users?