[carlosjobim]

Lowering your hosting costs usually translates into savings counted in the tens or hundreds of dollars per year. Loosing just a single customer because they can't see images of your product means loosing income of tens or hundreds of dollars, depending on what you're selling. Now take that times hundreds, or thousands of customers.

Optimized JPG images are tiny, and will load fast on any device. Any web designer worth their salt must know how to make a performant site without needing WebP images.