"me too" - rclone with Azure Archive tier for last-resort backups. I like that rclone doesn't tie me to one storage provider, and I'm not sure why anyone would use the linked project over rclone.
As mentioned in another reply below, I found these issues with rclone, perhaps you can tell if I'm missing something:
- It will not create archives by default, so potentially upload a lot of files (just like rsync). There are a few workarounds in the documentation to mitigate the cost.