I don’t think we’ll support archiving of notes anytime soon, we plan to add support archiving of projects. We are thinking of adding the option to pin notes to the bottom, just like you can pin them to the top. This would be the equivalent of archiving them in a way where they’d permanently stick to the bottom of the project. Together with the ability to collapse that should give enough options within the project. From there or alternatively you could move notes to a different project for more permanent archiving if you want them no longer at all present in the project.