I like the syntax, but I have to say that I prefer JSX. The real advantage of JSX is that it's very similar to HTML and developers have been reading, mentally modeling and reasoning about HTML -> DOM translation for decades.
I like to write my apps with one language where possible. I find the switch in context to much of an overhead.. but I am aware this is personal preference. Use what makes you happy :) it all gets compiled to vdom trees anyway!
That's the disadvantage, too: you gotta use html! Where are the lispers to talk about how much better sexps are?
Even with decades of knowledge, I think you'll find that devs can transition to the non-html model really, really quickly, and then it's nice because everything is a single uniform language.
For an alternative to JSX that's actually real HTML, but also real JS and requires no compiler, checkout lit-html: https://github.com/Polymer/lit-html
It lets you write HTML templates as JS template literals:
let post = (title, body) => html`
<h1>${title}</h1>
<div>${body></div>`;
But unlike using innerHTML, it stamps DOM from <template> elements, and only updates parts that change, actually doing less work than VDOMs.
Lots of editors have automatic support for inline HTML tagged with a tag named "html", so you'll get syntax highlighting in say, Atom. And VS Code has a plugin that adds intellisense.
Again just being pedantic here. This thing doesn’t look or work like HTML, but it does happen to compile to it too. I find Markdown way easier to read than HTML, and I read both all day long. Maybe having two decades of experience reading HTML Zoe whatever isn’t enough to offset the superiority of this format? (No idea. I dislike JSX, and I don’t think this is actually more readable beyond cute little examples, but I might be wrong.)
All I can say is readability is subjective. Hiccup is used quite extensively with Clojure/ClojureScript. Clojure for HTML rendering and ClojureScript as an alternative to JSX for Reagent. For people that enjoy Lisps I think it's probably great, for people that don't maybe not so much.
I definitely like the lower density of text that an absence of end-tags provides.