[EDIT: This might be a bit off-topic to the issue raised by the author] I find the whole idea of zero inbox incredibly useless to my workflow as I don't care to treat email as GTD. The only value I get out of keeping Mailbox on my phone is the snooze feature (which unfortunately no Google App Script or Chrome Extension has been able to address properly yet). Once that gets solved by Gmail, Mailbox will be a goner. And yes, even though the author pooh-pooh'ed them at the introduction of the article, lack of labels and a couple of other features (like Undo) make Mailbox a no-go for me on a regular basis. Countering these objections with "missing the point" is extremely lazy IMHO.