i personally have had no compatibility issues with webp - i would just rather my image formats are not owned by google, really. i would much rather use jpegxl, but chrome doesn’t support it because it competes with webp and we couldn’t have that, could we.
but also it’s that webp only works if you convert to webp manually, i find. their automatic conversion just ruins the colours (particularly on pixel art). plus, i do actually prefer png. i can edit what i want in a hex editor, whereas i can’t seem to do that with webp.
i have a browser extension that refuses webp, so i get served png where possible; but i can’t make sure that images i upload are served as png for others