I have to add the report that webp has completely annihilated the quality of all the images I've uploaded that were specifically made to showcase dithering and the quality of my texture work. It's straight up gross.
I get it that you guys need to cut bandwidth costs but webp was not an upgrade to jpeg back then, and it's not an upgrade today, it's a side-grade with serious drawbacks and several edge cases with clearly worse quality.
Please do not bother with lossy webp. Either ensure the pngs are fully optimized, or jump all the way to jxl or avif like what seems to be in the works. You can also use lossless webp to replace png right now, as it provides about 10-20% size reduction while remaining lossless.
I'd like to suggest jxl because it's an order of magnitude faster to encode than avif at equivalent quality settings, however we're waiting for google to either get smacked by the EU or yield to the pressure of the rest of the industry.