What i think should be in Drupal 8 core :)

1. When using views it would be very handy for an image field to have a replacement pattern with the relative url to a image to do something like this: <picture> <source srcset=”{{ field_customer_logo__uri|replace({‘.png’: ‘-mobile.png’}) }}” media=”(min-width: 960px)”> <source srcset=”{{ field_customer_logo__uri|replace({‘.png’: ‘-tablet.png’}) }}” media=”(min-width: 768px)”>[…]