[janwas]

Disclosure: I worked on JPEG XL, opinions are my own.

The radio(network) on phones can consume more power than the SoC(CPU). Thus smaller size can translate into energy savings.

As to hypothetical advantage, we are talking about HW _potentially_ being used for image decode. AFAIK this does not happen in practice, despite WebP non-lossless being a VP8 frame and the hardware being plentifully available.

As evidence for the advantages of JPEG XL being real, consider the fact that it is increasingly being adopted in serious SW including ACR, Darktable, Krita, and Lightroom.

[Latty]

JPEG XL is significantly smaller? All the stuff I've seen has show a slight edge for the same visual quality, but not enough I'd suspect it'd offset hardware decode, although if software doesn't actually do hardware decode, then yeah, the argument falls apart.

I can 100% see JXL being adopted in production tools, where the motivations are different, I was mainly talking about the web adoption perspective for end users (which is the context of Google's supposed war on it, of course).