@jeromechoo @beep @molly0xfff Back in the ‘90s, PowerPoint had an export to web function, which used a load of IE-only extensions to support all of the animations. As a result, IE could do any animation that PowerPoint could do.
I discovered this when ordering from a local pizza place at a friend’s house. He was the only person I knew still using IE and it turned out that what I’d thought was a fairly simple site (with a gratuitous number of background images) had weird transitions on every click. Looking at the page source, we found all of the non-standard CSS bits.
On the one hand, it’s nice that web standards have caught up with proprietary extensions. On the other hand, those extensions were an abomination unto Nuggan.