Datomic is used in mission-critical enterprise systems, and Hyperfiddle can be just a component of those systems.
It's like Google Docs for your core company database. Make a new page, start typing your query, and get the result immediately.
Hyperfiddle is about hyperlinks, like the world wide web but for data.
Use ClojureScript to tweak the result display with custom code, but only when you need to.
Not just for developers: database-savvy business people can use Hyperfiddle to solve their own problems, without waiting on engineering.
Building back-of-house UIs should not take weeks or months. Get them done today and then get back to work on your business.