I was thinking of switching to BlackBlaze as I'm currently using Digital Ocean Spaces -- however I might look at Hetzner again -- not revolutionary but quite competitive.
We use it for multiple use cases and all of them require lots of retries and error handling
essentially they're build for backups use case, with lots of spinning rust, any kind of "working data" easily underperforms
backups work fine because not time sensitive and retries handle the problems