I remember that every browser had an AJAX API, where IE had a specific API that was more straightforward. The AJAX capability was a forgone conclusion rather than a technical leapfrog. You could always had access to an HTML request and timers to code AJAX as a final backup.
Can you show any examples of these "features" that are forcing the hand of other browsers?
> think Outlook.com and the introduction of AJAX
https://www.sitepoint.com/xmlhttprequest-vs-the-fetch-api-wh...
I remember that every browser had an AJAX API, where IE had a specific API that was more straightforward. The AJAX capability was a forgone conclusion rather than a technical leapfrog. You could always had access to an HTML request and timers to code AJAX as a final backup.