I think this could also be useful for archiving protocolls and other information that you want to keep 'just in case' but have a I high probability of no longer beeing needed.
I suggest an easy switch to toogle this 'archive' -> "view/hide archived notes".
Like excluding a tag (Alt+click), but more permanently, i.e. not resetting. Would propose for this to be a tag property as well.
Customer support service by UserEcho