CloudConvert.com might as well be my fucking home page.
Please extrapolate a bit. I used the numbers to make it easy for you. Let’s try again.
10 000 people posting 50 KB images. And we are right back where we started. Webp is objectively better than old JPEG.
Also, “a jpeg of(‘or’?) a png of a 27” monitor screenshot" makes no sense. Jpegs and pngs are not the same filesize for the same image, and the diagonal dimension of a monitor is irrelevant. Are we talking 1080p, 1440p, or 2160p?