jpegxl actually has pretty good support - affinity, photoshop, gimp, krita, etc. all support it fine
it's only chrome/electron that's holding it back (even firefox supported it until chrome dropped support). i don't think it's lazyness
i have no love for gif (hence i use apng), but all the other alternatives are either videos so show controls by default, not widely supported, or webp. i realise webp is objectively the better format for most things, but i still argue it's existence is a net negative effect
webp may be open (although actually i'd argue it isn't, the licences for the decoder and the format itself are both very woolly), but as it's actively contributing to enshittification by holding back truly open formats i'd say that doesn't really matter
i doubt it, i don't see why an icon pack would have a systemd service. probably something to do with moonlight [nvidia]
still, thank you for introducing me to a new* icon pack