because $10/mo for 1TB of cloud storage isn't a terrible deal.
You think? Really?
You can get a USB 1TB HDD for the price of 5 months subscription if you need portability.
Or a 1TB NAS for the same price as about 1 years' subscription.
Both solutions are at the least 10 times faster, and will work fine when the Internet's down (which usually happens just when you urgently need the data).
And I trust the reliability of a HDD more than I trust "the cloud" as well.