string ones are those most of the Rubyists remember.

they’re just too familiar with the code to think it's complicated

The fact we’re using ActiveRecord (or something looking like it) doesn’t mean Trailblazer only works with Rails! Most people are familiar with its API, so we chose to use “ActiveRecord” in this tutorial.

Slots can already be pretty confusing to comprehend, I think it is better to stick to what people (may) already know.

The only "issue" it has is that its unfamiliar. People have been working with HTML for years and are comfortable with it. That's basically the only reason that people find it more readable. If you make an effort to spend sometime with hyperscript, it becomes as familiar and readable as jsx.