I think OPs point argues for itself. The example provided is awful developer ergonomics.

Okay but why. Surely if you have auto complete this works just fine.

The poster provided an example of poor abstraction. HTML for display, JS for client side logic. Combining them is part of the problem with other popular frameworks.

No, it's the entire point of datastar - that you don't need much JavaScript at all because some simple html attributes do most of it for you, and any extra can either go in-line, or you can also just fallback to separate js scripts if needed.

I think you, and others, just don't understand what hypermedia is or what the idea is trying to achieve.

Which is weird, because this is (was?) the predominant way to make websites for decades.

You mean like onclick?