With all these plain text posts surfacing regularly, I'd love for the lesser-known org markup (https://orgmode.org) to gain more adoption. It's a real power-house. Its Emacs origin may put some off, but it's plain text, so your content can be ingested/consumed by either regular text editors or any app focusing on specific user-journeys.
I built two org-powered apps for iOS myself:
There are other great ones out there:
Thanks to Karl Voit for driving org markup awareness outside of Emacs via Orgdown https://gitlab.com/publicvoit/orgdown. He's also got a great post showcasing org strengths at https://karl-voit.at/2017/09/23/orgmode-as-markup-only