

One potential advantage of being up while a whole lot of other companies are down is that some customers may end up switching to you during an outage involving the majority of your competitors.
Yes, you’d experience outages on the new service, but where you potentially lose X% of your business (I have no idea what that kind of number looks like - 0.1%? Higher? Lower?), in the event of AWS outage hitting all your competitors, they each lose 0.1% (or whatever) who disproportionately go to you because you were up while they, and other alternatives, were all down.
This potentially advantages the first companies to jump off AWS for a comparable alternative, which is fair sight better than if the advantages only showed up once some minimum of companies left AWS since no one would be incentived to be first.
It means they may have better access to improve rhe bunker.