I realize this is a super specific use case that not many people may fall under, and it's not really an "SDK thing", but it's worth an ask anyway LOL:
I have two Playdates — a Rev B on the stable OS which I use to play games recreationally, and a Rev A on the beta OS which I use in development to test performance and new features. Whenever I download a new game intending to play it on my Rev B, it will also install to my Rev A — and because I'm silly and hate notifications, it leads to me needing to go in to both Playdates and open both games (just to delete the game from the test console).
For sideloaded games, there's the ability to opt things in/out from different linked consoles on a per-game basis, and this is super convenient. Having something similar on the Devices page or where-ever convenient to just say "Hey, opt this device out of/into receiving game bundles from the Catalog" would be super convenient for me so I don't have to deal with popping it open every time something new comes along.
(I know I could just disconnect it from the Wireless or unlink it from my account entirely, but those bits are required to test out networking/leaderboard stuff so I'd like to just keep them enabled. :P)