Continuing to use Trello I found a need to take cards that had been sitting around a while and put them in a place other than Archive (and forget them). What I had been doing was copy/pasting them in checklists in another card and as needed taking the check list items and promoting them back to a card. However, after performing the manual process (which could take a lot of time) enough times, I decided it was time for another Power-Up. So, I created the Demote a Card Power-Up:
https://trello.com/power-ups/630d74e4e1bab6013d6c1160/demote-a-card
Also — while building this Power-Up, I also got a tad frustrated that there was not any IntelliSense code assistance from the Trello Library. So, I build one in JSDOC and will likely be publishing that on GitHub soon. Not sure how many other developers there are out there that write Power-Ups, but my hope is it might be useful.