If you're really lucky, you siphon off customers from the non-redundant service for this at the same or faster rate as they are signing up for the non-redundant service, allowing you to not have to build that out much for a short while.
I think the MOST IMPORTANT THING is that an online backup provider like Backblaze is totally transparent to their customers about their architecture and what we do and do NOT do. If our design is not reliable enough for your particular needs, then you are then able to make the choice not to use us. I never want to mis-lead customers and hide exactly how durable their backup really is.
Finally - what I recommend to my very closest family members and trusted friends is that for data you feel would be catastrophic to lose, I recommend you have at least three copies including the primary copy. That is two separate backups with TWO SEPARATE VENDORS who did not share any code, hopefully managed by two separate UIs. For bonus points, one backup should be "offsite". For example, many Backblaze customers use Time Machine on the Macintosh for a local backup, and Backblaze for their remote backup, and that is what EVERYBODY should be doing. I can show you many support cases where Time Machine failed to restore a file and Backblaze saved the day, and vice versa. The fact is that users make mistakes, UIs are hard to use, your 14 year old son decided to unplug the Time Machine USB hard drive to free up a USB port, or your 14 year old daughter decided to uninstall the Backblaze agent - in other words, stuff happens!!
I routinely recommend BackBlaze as a quick and easy cloud backup solution to family and friends. I view the risk of partial or complete data loss with BackBlaze extremely low compared to the local backup solutions that some people rely on (i.e. periodic backups to an external USB drive)
For myself and my own work files, I don't put complete trust in any single backup provider, regardless of what their replication policy is.
But I would still prefer not to be hit by any Meteors.
I have a fondness for Tarsnap and Arq, but I find Data Backup 3 from ProsoftEngineering to be one of the best for doing local backups. At the end of a day, I just toss in a 64 GB USB Key (with FileVault Encryption), and no matter how much data I've created, it usually is less than 10 seconds for a full versioned backup. SuperDuper Clone about once every couple weeks.
I originally quit BackBlaze because it fired up my CPU to 100%, no matter how much time I spent trying to tweak it, but now I'm running into the same issue with CrashPlan which, after a couple years, has started constantly scanning my filesystem, forcing me to sudo launchctl unload /Library/LaunchDaemons/com.crashplan.engine.plist, and then remembering to sudo launchctl load /Library/LaunchDaemons/com.crashplan.engine.plist before I go to bed to let it run overnight.
What is it about Crashplan not letting you just shutdown everything from within the application.
This type of service starts at around $175 for 500 GB of SSAE16-audited datacenters, but you get all the things that consumer based backup systems don't - such as Plugins for SQL, Exchange, Hyper-V, NetApp, as well as Backup & DR software licenses for an unlimited number of servers - and, most importantly, 24 x 7 US-based engineer-level support.
"Right now, Backblaze has only one datacenter, so the short answer is "no". :-)
The longer answer is that for online backup, there is one copy of your data on your laptop, and another copy in the Backblaze datacenter in Sacramento. If a meteor hits our datacenter in Sacramento pulverizing it into atoms, you STILL would not lose one single file, not one - because your laptop is still running just fine where ever you are with your copy of the data. In the case that occurs, we will alert our users they should make another backup of their data."
There are a million one things other than a comet strike that can go wrong in a data centre. I would not trust a backup provider that does not replicate my data across at least two data centers.