Modals are, IMO, the literal worst UX element you can hate your users with. There are certainly valid use cases, but _absolutely not_ should be the default.

How come? I find them nice to allow for certain actions that don't really require navigation, and may want the user to easily return whenever they do anything in the modal or not. I understand it is historically bad due to accessibility, but there's more native support for it now. Assuming it is implemented with that in mind, is it still bad?