When I say “at the node level” I’m trying to draw a distinction with the service level view where a client is talking to S3 as a (from their perspective) single

When I say “at the node level” I’m trying to draw a distinction with the service level view where a client is talking to S3 as a (from their perspective) single entity per region. So a better way of putting it may be the internal view of the service, where partitions are between nodes that are part of S3 itself (as opposed to between a client and S3) and they affect the overall health of the system. I’m not referring to a single node being partition resistant (hence why I said node level, and never mentioned single) which as you said wouldn’t make any sense.