There's also the very basic disappointment that a piece of good software won't grow to maturity. I finally found a mail client that restored my faith in SMTP as a communications medium; a mail client that had me managing email exclusively on my iPhone. A mail client that broke away from email as a metaphor for paper envelopes with written messages on pulp.

I liked handling email in Sparrow. It felt modern, and now it won't get any better.