Of course there are tons of better formats than JPEG but it needs to be understood that the most important feature of JPEG is to be exchangeable. It doesn't matter what your shiny new web browser supports, JPEG is considered supported everywhere and all editorials actually refuse to accept anything other than JPEG. You can't just break everyone's workflow because Google decided to force WebP (for purely selfish reasons, of course). The web browser is actually one of the least important platforms for JPEG. To day JPEG still executes its mission perfectly and with huge bandwidth increases it doesn't even matter how large the file is.