I don't believe PubSub has a way to ensure linearizability between messages, where Kafka does have this by deterministic hashing of keys partitioning. Otherwi

I don't believe PubSub has a way to ensure linearizability between messages, where Kafka does have this by deterministic hashing of keys partitioning. Otherwise yeah, Pubsub looks pretty solid and economical. At my company I'm guessing we push over 200M messages a day through it, and it is a breeze to maintain and stable as hell. Maybe gets harder a couple orders of magnitude more, but no complaints here.