Very few businesses care about accommodating "one in a trillion" edge cases. (Most would call that over-engineering IMO)

"None of the deployments under consideration for this new initiative use that mechanism, that other deployments might is irrelevant to the internal product we are building"

In my space this is usually something like, "X won't work on POSIX make", being a reason not to add X to the build system. Well, it works on Ninja, and on GNU make, so it just won't work on POSIX make and the handful of deployments still using POSIX make just won't use X.