Currently switching my S3 storage from Backblaze B2 to Intercolo i3, as part of removing reliability from US companies (Intercolo is hosted in Germany). And because performance was a problem the recent time (failed or hanging uploads).
It took me a while to find a provider with similar overall prices, but currently, uploads work just fine via rclone in the first free month. And it has statistics!!! 😍
As backup storage, it seems fine. Can’t tell you more at the moment.