Earlier quoted context omitted.
Yes, but on the other hand, there's https://www.reddit.com/r/ididnthaveeggs/ , which collects cases of home cooks making inadvisable recipe substitutions and then complaining to the recipe creators that the resulting dish tasted bad. Sometimes there are essential ingredients and skipping them or replacing them with something else makes success impossible.
An appealing analogy but recipes have defined testable outcomes. You know what a Victoria sponge is supposed to look like (there's probably even a picture of one in the book). You can perfectly evaluate when a substitute has ruined it. Agile doesn't have that, there is no functional equivelant of "the cake should be moist and rise evenly". What does "Agile" adoption look like? Faster delivery? Happier Developers? Mor…
That's not true for the way I understand agile. The way I understand it, the testable outcome is whether the principles of the agile manifesto are satisfied
For example, is your highest priority to satisfy the customer through early and continuous delivery of valuable software? If not then you're not agile.