Wow that's shockingly many still. But that statistic is to be expected somehow, there's a lot of old sites still around. Still it's a horrible, incredibly restricted format.

I come from a computer graphics background an thus am interested in image formats and how they work... whether the web "needs" webp doesn't really come into it.

To be fair, the vast majority of the web is built and never touched again, so I’m not surprised about that figure.

Regarding WebP, it’s nice to have options, but ImageOptim is getting PNGs down close in size for me :)

Not true, a ton of sites go offline after a few years. If Geocities was still around it'd probably skew that value way up ;)

Geocities is still around (under a different name): http://reocities.com/

What about all the smileys? Does that account for the 34%?

Thanks for sharing this very useful resource!