. - If I mis-enter information into a form, your error handling forgets all my information and I have to re-enter it. Funny that you mention it. Loosing form d

. - If I mis-enter information into a form, your error handling forgets all my information and I have to re-enter it. Funny that you mention it. Loosing form data on page refresh or clicking "back" button was a problem on the Web until browsers started keeping form state along with page history. Suddenly millions of websites got this new feature without actually doing anything differently. But that was only possible because page transfers were semantic. Frameworks of that time that tried to manage their own form state (like ASP.NET WebForms) didn't have real page transfers, so they didn't get this "upgrade" and currently are significantly worse off in terms of usability. I think there is a lesson here.