Reducing motion with the picture element

Here’s a bonafide CSS/HTML trick from Brad Frost and Dave Rupert where they use the element to switch out a GIF file with an image if the user has reduced motion enabled. This is how Brad goes about implementing that:

How nifty is this? It makes me wonder if there are other ways this image-switching technique can be used besides accessibility and responsive images…
Also, it’s worth noting that Eric Bailey wrote about the reduced motion media query a while back where he digs into its history and various approaches to use it.
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