[csbrooks]

"Dropbox sucks", with specific reasons why, is informative to me as a potential user.

Not sure "so what?" is a reasonable test anyway. If you're snarky enough, couldn't you ask that about any article at all?

[normloman]

It doesn't matter how snarky you are. You're not asking whether it matters to you, but whether it matters to your audience. Unless you're writing to an audience of nihilists, the test is still a helpful judge of newsworthiness.