Egress fees can make replicating databases, storage buckets, etc. between clouds very expensive. Multi-region is a much more affordable option. Multi-region out

Egress fees can make replicating databases, storage buckets, etc. between clouds very expensive. Multi-region is a much more affordable option. Multi-region outages aren't unheard of among the major cloud operators, but they're less common than single-AZ or single-region outages. IMO, most companies just aren't sensitive enough to downtime that multi-AZ + multi-region deployment within a single cloud provider isn't good enough.