Try doing the following things without using JavaScript.

1. Implement a Delete button that uses the correct HTTP verb .

Problem: There is no way to use a different HTTP Verb than POST or GET from HTML only.

I wish: I could specify the http method being used for both an anchor element and a form element.

2. Implement a Save button that will use the best practices for offline locking, namely the etag and if-match header.

Problem: There is no way to add headers to a request with HTML only.

I wish: I could specify additional headers when sending form data.

Bonus Points

Enable declarative partial reloading using server side rendering.

I am thinking of something like https://hotwired.dev/

Just as a native HTML solution without any JS.

These additions would go a great way of enabling more fine-tuned user interactions using easily degradable HTML.