Managing your risks is fair, but it's not clear that Google Drive is less reliable than Dropbox.
1) Google Drive is a fundamental part of their online office suite, which means it's used internally for day-to-day employee work. Reader, Wave, Finance didn't get that status. Not to mention that having paid enterprise plans means it's a bit more mature than other things.
2) In 5 years, Dropbox could very well be referred to as "the discontinued Yahoo! Dropbox" or something similar. Not easy to predict that either.
1) Google Drive is a fundamental part of their online office suite, which means it's used internally for day-to-day employee work. Reader, Wave, Finance didn't get that status. Not to mention that having paid enterprise plans means it's a bit more mature than other things.
2) In 5 years, Dropbox could very well be referred to as "the discontinued Yahoo! Dropbox" or something similar. Not easy to predict that either.