The espoused amazon groupthink seems to be from "earlier" amazon which, to your point, was practically greenfield for everything.
IMO only now is Amazon starting to run into the long term consequences of massive adhoc inhouse tech tools, probably only worsened by defensive coding techniques to combat stack rank evals.
I'd like to say that the most modern example of two way door decisions is hiring someone, because you can always just fire them immediately as the stack rank sacrificial lamb. See? Easily undone.
IMO only now is Amazon starting to run into the long term consequences of massive adhoc inhouse tech tools, probably only worsened by defensive coding techniques to combat stack rank evals.
I'd like to say that the most modern example of two way door decisions is hiring someone, because you can always just fire them immediately as the stack rank sacrificial lamb. See? Easily undone.