The repeated callouts to PageSpeed imply that their concerned about search placement, which is understandable for the profession. If your site is bumped off the first page because Google doesn't like that you're still using JPEG that's lost income for you.
It can also be an issue if a client asks for WebP. Do you give in and deliver a lower quality image and allow your art to be displayed in a degraded manner? Losing future clients who think your photos look bad. Or refuse out of dignity and lose the current client?
It can also be an issue if a client asks for WebP. Do you give in and deliver a lower quality image and allow your art to be displayed in a degraded manner? Losing future clients who think your photos look bad. Or refuse out of dignity and lose the current client?