> There was no useState per form element, form data was trivially validated on the server, errors were trivially sent down to the server you can always do this

> There was no useState per form element, form data was trivially validated on the server, errors were trivially sent down to the server you can always do this, regardless of react or not, people did not do it because they want to do client side validation/feedback. Not to mention forms have nothing to do with endpoints. Mirroring your UI after some endpoints is a shitty way of making UI, or API. Sometimes you just have dialogs or wizards to build up the state of the payload and the submission happens much later.