One of my main problems with hey is that there's no way to track which emails in "the feed" you've read.<p>There are many newsletters that I do intend to read and some I only look at occasionally. Adding to the "set aside" pile is a pain to do.<p>For now, I've transitioned as many newsletters as possible to RSS using kill the newsletter but it doesn't work as well as email in many cases.
I thought this was a pretty interesting read, especially about how they used Jekyll as a prototyping tool. It's always great to see the different variations of a product, especially a new one, as it takes shape.