One of the biggest limitations of markdown is the lack of extensibility. Nimble, a competing syntax, has macros!
miniblog.
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I often use Quip for writing documents and I've started using Google Slides for presentations. They have fewer features than competing tools, but I like them.
They have what I need, without being overwhelming. Maybe it takes a paradigm shift (e.g. desktop->web) to drop features.
Including poetry in your database protocol, to prevent competing implementations!
Bose has a competing product too!
https://www.bose.com/en_us/products/frames.html
Perhaps ambient computing has finally come of age.