I remember fights over whether or not navigation in frames was bad practice. Not iframes, frames. Who here remembers frames?
I remember using HTTP 204 before AJAX to send messages to the server without reloading the page.
I remember building... image maps[1]... professionally in the early 2000. I remember spending multiple days drawing the borders of States on a map of the country in Dreamweaver so we could have a clickable map.
I remember Dreamweaver templates and people updating things wrong and losing their changes on a template update and no way to get it back because no one used version control.
I remember and handling where you clicked on an image in the backend.
I remember streaming updates to pages via motion jpeg. Still works in Chrome, less reliably in Firefox.
I remember the multiple steps we took towards a proper IE PNG fix just to get alpha blending... before we got the ActiveX one that worked somewhat reliably... Just for tastes to change and everything to become flat and us to not really need it anymore.
I remember building site navigations in Java, Flash, and Silverlight.
I remember spacer gifs and conditional comments and what a godsend Firebug was.
I don't know when I got old, it just happened one day.
1. https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/...