In reply to Doug.

So far, my personal “fix”, or more like workaround, for this issue, has been to use one of the few available plugins that generate the resp. image sizes “on the fly”, ie. on-demand, when the image is actually called. The obvious disadvantage of that method of corpse is: The user will not instantly get the image shown, it has to be processed first.

Maybe a mix of both would be more efficent – ie. generate only selected image sizes, eg. thumbnail / medium for previews, and then, when the on-demand call comes, the plugin uses this already existing thumbnail or medium image as a placeholder, until it is done processing the actually requested image size. Something kind of an adaptive image site aproach – although IDK how well this is going to work together with the picture element or the srcset attribute.

cu, w0lf.