I have never seen a company that uses multiple AV products rolled out to user machines, ever. Sure, when you transition from one product to another, but across the whole company, at the same time? Never... I have also never seen a distribution of something like active directory servers based on antivirus software. I think these stories are purely academic, "why didn't you just..." tall tales.
Mine certainly does, our key windows based control systems use windows defender, the corporate crap gets sentinal one and zscaler and whatever else has been bought on a whim.
I'd assumed that any essential company would be similar. OK if your purchasing systems for your hospital are down for a couple of days it's a pain. If you can't get x-rays it's a catastrophe.
If half your x-ray machines are down and half are up, then it's a pain, but you can prioritise.
But lots of companies like a single supplier. Ho hum.
