Don’t blame Sparrow. Blame the terrible market for email clients.
[So why is there such a terrible market for email clients. I admit I’ve come to loath email, because a generation of folks have been taught to abuse and misuse it. Still, you’d think that there’s enough of a market, even with the “meh” if default options. I enjoyed Sparrow for the iPhone because it let me separate work email from everything else in a really easy fashion. Ah well.]