Thanks for all the answers!
To ncw:
You are probably right, my gauge for “corrupted” was simply “not playable by Plex”. But when downloading the file and playing it locally it works so it’s an issue with Plex, not rclone. If i do find any corruption I’ll be sure to report it.
I am a little amazed that rclone can handle all my abuse, thanks for this tool! I can saturate a duplex 1 gbps link when backup up from one cloud drive to another.
Since I don’t actually have any verifiable corruption I’ll stick with the proven way of caching locally and moving to a remote periodically.