[AshamedCaptain]

HVIF requires some pre-tuning on the source icons so it may never be an apples to apples comparison.

In any way I find the author's statement that, because HVIF claims "you wouldn't really want to use HVIF to store generic vector graphics", then HVIF should not be considered as an alternative.

Precisely HVIF excels as a "compact, binary format for simple vector graphics" and that is exactly what they mean when they say that it should not be used for generic vector graphics. So I could claim this is just reinventing the wheel...