What would the best format to convert user-submitted images? We need to update our image pipeline soon, so I'm looking into various options.

It looks like you still have to keep jpg/png around for a few years at least. Even if you drop IE11, there's a few versions of Safari out there that don't support even WebP.

So the pipeline would be:

* png -> resize -> png/lossless webp * jpg/other -> resize -> jpg/webp

Where "other" is whatever format iPhone cameras use.

Is there anything I'm missing if I were to do this today?