I think another issue with mainsteam social media users and Steemit is technological accessibility.

The majority of social media users create content on their smartphone - it's why videos are so prevalent as a medium in the past few years. You can't write long posts on your mobile. But this exists on reddit as well.

Another issue with technological accessibility and mobile is the lack of a well marketed mobile app (or mobile strategy in general). I had trouble finding eSteem on Google Play and I work (among others) in app marketing.

If steemit had a neat little link in the menu leading to a page with download links for mobile apps - it would increase user engagement and attract more social media users who are reluctant to use steemit. Granted, a lot of their contribution would be curation rather than creation, but this is, again, true about pretty much all social networks.

I kinda feel like this comment should be its own post. :P