A nice feature of APNG (and GIF) versus the more modern CSS/SVG animations is the CPU efficiency. It's really easy to accidentally waste a ton of battery life by adding a tiny spinning gear to a page.
It varies depending on the browser and whether the GPU is used for compositing, but it's much easier to optimize blitting a rectangle each frame versus blitting a rotation of some complex vector shape on top of the page.
A nice feature of APNG (and GIF) versus the more modern CSS/SVG animations is the CPU efficiency. It's really easy to accidentally waste a ton of battery life by adding a tiny spinning gear to a page.
It varies depending on the browser and whether the GPU is used for compositing, but it's much easier to optimize blitting a rectangle each frame versus blitting a rotation of some complex vector shape on top of the page.