Here we go again. Getting a bit tiresome hearing about this "durability issue".
I really don't understand the problem. No, MongoDB isn't durable the same way MyISAM/InnoDB is with MySQL.
But I think that is clear as day, certainly no news to me when choosing MongoDB.
Been running it in production for 3 months, working fine. If it for some reason would be data loss or corruption, I wouldn't come crying to the devs. I know what risks I took when making the decision.
If the backups aren't there I can only blame myself when such event happen.