HTML Form Validation is heavily underused

HTML form validation is often underutilized despite offering several powerful methods. The `required` attribute prevents empty submissions, while `setCustomValidity` allows for complex validation logic. However, using purely imperative APIs like `setCustomValidity` in a declarative framework can create boilerplate issues. Implementing custom validations, such as async server checks or dependent input fields, showcases the power and flexibility of these APIs. Better native support in HTML standards could improve adoption.