Our D&D group used Owlbear prior to migrating our current campaign to Roll20. One of the nicest aspects was any player could throw their own uploaded art into the scene to represent any number of things (summons, lingering spell f/x, broken tables, location of thrown/dropped items, etc.). Not having this in Roll20 made me realize two benefits we are missing: 1) The scene can remain more up to date and richer with minor things the GM is too busy to go and find in their own Art Library and place correctly, while trying to manage combat etc. 2) It gives something for players on "downtime" (not their turn, not active in a current dialog, play not focused on their character atm) to do and play with, and makes it overall more fun for everyone. Players can already draw on the scene, so this is just an extension of that permission to allow them to drop items from their Art Library in as well. I can also understand that not all games would want this, but for more casual play where the GM doesn't need as tight of control and is OK with offloading that attention budget to the players, it's really nice and something we miss from Owlbear. I would suggest a GM option in the game settings that allows this, defaulted to off, but just a simple toggle. And of course the GM has ultimate control to delete/adjust anything in the scene. I have no idea if this is difficult to implement in Roll20 architecture, but it would be a fantastic option that my players have been asking for since we switched to Roll20.