cognitive psychology. PhD 
String-first programming languages seem to be a really interesting and underexplored design space. I want something halfway between JSX and Scribble, but not MDX.
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Scribble is by far the best example of this design, but I've found it hard to directly translate its concepts into JS / React. Eg sometimes you want to generate a string (say to pass to KaTeX or Penrose), sometimes you want to generate a React element.
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Also "underexplored" isn't quite right. The web is rife with templating languages, which are string-first PLs. But they all suck, except for JSX.
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I got out of web stuff right before JSX became popular: what makes it not suck? I remember using Handlebars and ERB at work and wishing there was something better.
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<ol>{http://elems.map (x => <li>{x}</li>)}</ol> Can't do that (.map) in a templating lang, bc the programming model is never a general purpose PL. By contrast, JSX has the full power of JS.
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Where does PHP fit?
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Best in show 15 years ago. But these days, it isn't as well-designed a PL as JS, so you can't do this:https://mobile.twitter.com/wcrichton/status/1465390600468013065 …
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