Unless your fiber has an outage, then you want redundancy, multiple independent uplinks that is.

And if your whole region has a problem, which is more likley to happen than one might think, then you want a multi-region setup e.g. us-west-1 and us-east-2, and then we can start to calculate the numbers of nines, unless your username is ocdtrekkie, he can beat AWS with a single NUC while he is sleeping.