Google guide states
“Image formats like JPEG 2000, JPEG XR, and WebP often provide better compression than PNG or JPEG, which means faster downloads and less data consumption”.
Does anybody follow this as there seems to be less universal adoption than good ol’ .jpeg.
Forget Jpeg 2000 and Jpeg XR. There is nothing wrong when them, however they never caught on and not widely supported. WebP is different in that it is created by Google, however it doesn’t not work in Safari, which is most likely down to politics https://caniuse.com/#search=webp
You can actually set up a website to serve WebP to Chrome and Jpeg to Safari, but all of this requires server side adjustments and it’s not something you can do by default in Blocs. If you really want to do this check out Cloudflare, but I think this requires a pro package costing around $20 a month. I did this in the past at one point, however it’s just one factor among many.
As suspected, but at least we know now.