PM_ME_VINTAGE_30S [he/him]

Those do actually go down.

That’s the point I’m making: when those examples go down unplanned, in particular hospitals and the power grid, in particular the examples you gave, those can be catastrophic events. I.e., if we ignore planned downtime, then these businesses really need five lines of reliability during the times they are expected to be up.

I agree with the overall point that the average business doesn’t need five nines of availability, but I wanted to point out that there are definitely businesses that do.

Good point, but that’s planned downtime.

Your business will not collapse because of 10 min of downtime a week, and if it does that is not technologies fault.

Hospitals? Air traffic control? Power grid operators? Like these are exceptional businesses, but they’re out there.