I'm bored so I decided to see what all the noise about modern image formats was and use picrel to test them. This isn't just any PNG btw, I compressed it with oxiPNG and used max compression for the newer formats to make the challenge more relevant to anyone using a computer that isn't a potato.

PNG = 32,961 bytes

AVIF = 21,361 bytes
https://files.catbox.moe/6l1d0k.avif

WebP = 10,174 bytes
https://files.catbox.moe/obfjjs.webp

JXL = 9,719 bytes
https://files.catbox.moe/f2qokk.jxl

JXL absolutely dominated, achieving ~71% better compression efficiency and WebP achieved ~69% better compression efficiency which is still NOICE. AVIF achieved ~35% better compression efficiency which isn't too bad either but it's puzzling how a 2010 image format (WebP) is outperforming a 2020 image format (AVIF).