I will never ever trust my most important files to companies for whom storage is not even their fifth most important concern. Dropbox will be my primary storage solution for that reason for the foreseeable future unless the fuck up real bad.
This way of thinking doesn’t quite make sense to me. Since those companies are huge, they could within them contain an organization that has more resources than Dropbox dedicated to storage. This organization will be completely focused on that goal. What if some company buys Dropbox?