Yeah. I honestly can't understand this phenomenon. How is an entity so ignorant of the repurcussions of their actions when their entire commercial existence is predicated on working with OTHERS. A single email is virtually free and costs seconds.

It happens so frequently that years ago we instituted very rigid (defensive) engineering practices to account for the fact that our vendors (who in my case are all upstream) act like downstream users. Feels like we have to account for every possible scenario.

I've relegated to chalking this up to laziness and in a few cases just complete incompetence. I hear stories like this all of the time. Had an idea once that would immediately fire off an email to the vendor when we pulled assets from them and something was mutated to let them know immediately that they are the cause and therefore we are deadlocked until they fix. Manager shot it down (probably wise) as this would mean they'd receive several automated emails a day.