Dropbox has announced that it’s shutting down Carousel, its photo management app, on 31 March 2016 and Mailbox, its suite of email apps, on 26 February 2016. Dropbox said that it will integrate features from both apps into its core cloud storage offering. Carousel was an original creation of Dropbox in 2014 and at least made some sense, while Mailbox was an independent app that was acquired by Dropbox in 2013 for reasons that were never clear. The moral of the story for Dropbox? Stick to your knitting, or in this case, file sharing and document collaboration.