JPEG XR (.JXR) and JPEG XL (.JXL) support?

[Xogroroth]

Hail:

Lately I am more and more confronted with the .JXR and .JXL format, from my company out.
I often want to edit these, alas ... 
... GIMP does not appear to accept this format.
Which is sad, as GIMP is my tool to go, I like it a lot more than say Adobe's Photoshop, which I also have, but ignore.
Heh.

Is it possible to have these 2 formats in the next GIMP edition, please?

Thank you:
Xog.