I'm a big fan of Garage[1], which is a dead-simple S3 drop-in that you can host on your own drives. It's designed for consumer hardware with shitty internet in-between nodes.
FWIW, I have an EU region cluster (3 nodes per inner-region in the North, West and South). It’s all one logical region to S3 libraries and holds nearly half a terabyte.
It’s probably one of the most stable parts of my infrastructure. I don’t know (or need to know) what the replication lag is between regions, but IIRC, there’s some configuration of consistency.