Bellazon images no longer in jpeg format but instead webp?

I noticed a change about a week ago. In my browser I still see links to jpegs for most older posts (excepts ones where the uploader would have been upping genuine webps), but I am actually getting served Google's webp format.

An example:

I downloaded this image last month and it was a 920kb jpeg. Redownloading it now and I get a much smaller 375kb webp. And the images I uploaded used to be in the format MyFilename.jpg.bellazonstring.jpg ; now they are MyFilename.webp.bellazonstring.webp

I'm not sure it this is happening to everyone (I tried a Firefox and Chromium based browser), and if so, how other uploaders and downloaders feel about the change. Most people I know prefer jpegs to generally lower quality lossy webps. Lossless webp on the other hand is good, 30% smaller files than pngs with no loss in quality, but rarely used. When I gather images from various places on the WWW, I try wherever possible to get the original jpegs rather than jpegs transcoded into webp or avif.