> You can say you don't care for reality, but it's not going to help you have better systems.

No where in my sentence I said this so quit the strawman argument.

I know a client using a service that has 100% uptime for the year, that also relies on huge clients, I don't understand why Fastly can't guarantee at the very least and a failover system to counteract this, but clearly didn't work. (or even existed)

> (Or decided Fastly going down was an acceptable business risk, which it is for nearly everybody).

Then why did this cascade to almost everybody even indirectly? Surely their advertised failover system would have prevented this from prolonging further but lasted longer than it should have.

I don't think a store, exchange or trading desk not accepting payments from people for an hour is acceptable at all.