We use it without fallback where development budget is low and the audience is mostly up to date and/or predominantly mobile. For everything else, it’s easy to

We use it without fallback where development budget is low and the audience is mostly up to date and/or predominantly mobile. For everything else, it’s easy to either generate webp alternates to jpeg/png and use a picture element (for non-responsive srcset, only three inner elements are required for this), or to use Cloudflare or an image CDN that automatically serves webp. Usually a project that requires a framework or SaaS that can’t easily support one can use the other.