Backblaze's latest drive report shows an annual failure rate for hard drives of 0.85%. I very strongly suspect the total of all failures of the type you're listing there is many orders of magnitude lower than that across all cloud storage users.
If you care about your backups, a single cloud vendor/account vanishing isn't going to be a problem, in exactly the same way that if you care about your backups,m a single drive failure will not be a problem. They are both predictable and mitigable risks.
Yeah, but it certainly feels in the right ballpark from my personal experience. I’ve normally got 20 or so drives in use at any time (perhaps fewer spinning rust drives not that ssds are more common), and I have a drive go bad occasionally - not every year or two, but certainly every 5 years. So I reckon they’re at least order of magnitude right.
If you care about your backups, a single cloud vendor/account vanishing isn't going to be a problem, in exactly the same way that if you care about your backups,m a single drive failure will not be a problem. They are both predictable and mitigable risks.