I wish developers in the front-end ecosystem would hold longevity in higher regard when innovating. When identifying a shortcoming in the web platform, help improve it rather than inventing another framework silo - while throwing out so much hard work that has gone into things like accessibility, separation of logic from content, and more.
When you develop an app, it's for now and not for 10 years into the future when it has finally been standardized, reviewed, accepted and implemented in all browsers as well as having all the older, non-compatible versions disappear.
We're 25 years into HTML and applying form validation only after an initial input (so as to not display a form filled with red input fields) still isn't a thing.
Hell, even regular form validation still is only applied on form submission and lots of browser versions still aren't compatible.
That's after 25 years of <form> tag existence.
So no, every time somebody talks about the complexity of frontend development and how everybody should stop using JavaScript and use pure CSS and HTML, they forget that the technologies are hot garbage that evolves at the pace of snail.
And checkboxes can still not be styled. But that's another one of the multiple problems in HTML and forms in particular ...