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.