Necessary. Some people, especially in management think that something which works but does so by exploiting accidental interaction of the build environment is a

Necessary. Some people, especially in management think that something which works but does so by exploiting accidental interaction of the build environment is acceptable, and then the blame falls on the person who makes the unrelated change that breaks the trashy code, so the thing is cast as blame on the guy who changes things rather than opportunity to fix latent bugs. It is a common attitude among non-programmers too and on people who think delivered fast matters the most.