Quite honestly there are so many developers out there that just crunch a website together and do nothing about different image sizes, especially when a theme or plugin introduces them that I always found that there is a hell of a bloat regarding images. If the developers are so concerned about useless files, why don't they tackle that issue that has been there since the beginning first? Like mentioned, processing images on the fly when they are needed to size that is actually needed is something that exists in other CMS for a long time. Webp is for now the new standard regarding core web vitals and as such it should be considered to be a standard format without having to install 5 other plugins. You could even go that far and just convert it when it's uploading, discard the jpg and just store the webp.