I'm just afraid of data loss, but I also know that that is unlikely. I have a local backup but sometimes I feel like that's not enough, unfortunately my budget is also tight which means I can't spend too much on replicated buckets/another cloud provider with a complete backup etc.
Also, have you ever faced the issue where you're pushing files to backblaze with rclone and there are many failed uploads (rclone retries them eventually after reaching the end of the queue), which is something I've never had with S3. Well, you get what you pay for I suppose.
Can you explain the situation around you restoring a backup? Did backblaze lose your data?
AFAIK AWS replicates your data across buckets for reliability in case their datacentre goes down, which (from what I understand) is the cost of a whole another bucket with B2. That's my concern. I don't think Backblaze is going out of business any time soon but I'm afraid of data loss (I do have one local backup but my budget is unfortunately a bit tight right now - I'm going to have to pick and choose important bits from all of the data and add a second backup I guess)
How much does OVH cost you for storage?