Editors add [[https://www.wikidata.org/wiki/Q8213590|Sister project]] boxes, e.g. "There is other content available on Wiktionary" and [[https://www.wikidata.org/wiki/Q5830969|Sister project links]] boxes, e.g. "Find more about San Francisco at Wikipedia's sister projects [...list...]", and [[https://www.wikidata.org/wiki/Q6369522|Sister-inline]] links, e.g. "Media related to Cat at Wikimedia Commons"
Now on certain pages we are duplicating this content which causes bloat to the html which should be as thin as possible.
I think the side bar is great - is there some way we can consolidate these two things and remove the need for in-article boxes that take up much needed real estate in mobile?