Quite clearly it was about the WebP in particular. Indeed it isn't a first.
Hence the question mark.
Of course, the routines are available for Linux, but beyond the example webpconv file converter, what can you actually do with WebP on Linux? Does anything else support it?
With this datatype you can actually use WebP files under AmigaOS just like any other image file format, without the need to convert the files back to something else first in a manual process.
I've just written the code for NetSurf for WebP too, so at least one web browser will shortly be supporting it. Whether WebP takes off... well, we'll see. With Google behind it, it just might.
As for JPEG2000, there are some incredibly high quality NASA charts in JPEG2000 format, the lower quality ones are JPEG. It may not have much of a foothold, but there are JPEG2000 images out there in the wild - unlike MNG/JNG.
It takes a long time for a new graphics format to gain a following, I was using PNG for years (on my website too) before the main browsers started supporting it properly, and got lamented for it. Now everybody uses PNG. You have to start somewhere. I'd rather release this now and show that AmigaOS is still up-to-date, than wait five years for the forums to be full of "why can't I view this image, it's in WebP format?".
Besides, it was quick and easy to do, I've probably wasted more time explaining myself than actually writing code.