So apparently there’s this hot new app that just released called Mastodon, and everyone’s leaving Twitter to join that. It’s OK if you haven’t heard of it, it’s that new. Snark aside, people are stumbling onto Mastodon because they’ve been told it’s the biggest Twitter alternative (it probably is), which isn’t really saying much – there aren’t a lot of Twitter alternatives that anyone would really think twice about. It does a good job of replicating the basic Twitter experience, type some things into a box and click the post button to publish. But there are important, non-obvious (to general users) differences between Mastodon and Twitter, and people seem to be struggling with them.