The newest iteration of Posts sees the implementation of a number of improvements that will make it easier to create, share and discuss long-form ideas/pitches. Basically, Posts 2.0 contains a fully fledged CMS (much like Tumblr/Wordpress) meaning you can drop in pictures, Tweets, bits of code, anything you need to get your point across. Posts even contain a standalone comments thread so conversations about the project can be found all in one place, making ideas and edits way easier to follow.
A post is created in private as a default and can be shared with an individual, channel or even publicly, searchable by anyone over the Internet. Even though the new features within Slack are welcome, it has taken the developers nearly two whole years to implement these changes and they're only available on the desktop client. Following this pattern, we're penciling in Posts 3.0 for your iPhone 7s and Nexus 6XP sometime in 2017.