I actually wish we had more advanced features in HTML itself. There are still many cases today where you only need JS to load something on click or for a simple

I actually wish we had more advanced features in HTML itself. There are still many cases today where you only need JS to load something on click or for a simple datepicker. If some basic things like <input type="date"> and the <details> tag (and associated css) were actually standard, reliable and working, we would not need JS at all most of the time. I also wonder after 20 years why we still don't have something like <a target="#myDiv"> or <form target="#myDiv"> to dynamically load content rather than billions of specific ajax query scripts everywhere.