Yep, absolutely! Manual sort is up there in our list of priorities, the main issue we’re having is how manual sort works when you are collaborating on Supernotes with others, otherwise it would be a little more straightforward 
. But we hope to have something out their soon, esp now that v2 is released.
In the meantime though, the outline is now sorted in alphabetical order (a change from “totally unordered” as it was when @tobias last commented haha), so although its not ideal you can organize your cards by prepending their titles with numbers/letters/etc in some alphabetical order.
But again this isn’t a great solution so we want to release something better in the near future.