Once upon a time I was a tester. Now I am a sys admin/DevOps engineer (what is a name, really?). You would not believe the amount of bugs I would find from bot

Once upon a time I was a tester. Now I am a sys admin/DevOps engineer (what is a name, really?). You would not believe the amount of bugs I would find from both vendor code and internal code. Bugs that require dynamic execution and context-spexific scenarios to reveal themselves. Then you had misinterpretations of requirements, which is not something the developers would find, considering they wrote the code and believed it met the requirements. I worked for the police force of my region as a software tester for all their critical systems. I once developed a test tool that created packets to mimic mobile phone calls to police dispatch. I tested every combination of the data spec, including the very last one, where there was a critical bug. The vendor code had implemented the earlier version of the spec, not the latest. The vendor's test tool created the wrong packets as it targeted the wrong spec. Mine caught the bug cause it creates the correct packets. As much as I agree with the author's ideas of familiarity with Production, proper unbiased and independent testing is still something this industry needs, even if it's unfashionable.