State on folder data card, good or bad idea ?

Hello,

I using !obsolete to filter usable files, but that didn't help find the folders, because they don't have state ?
Should I add the state to the folder data card? Or should I avoid doing so? If not, what should I do? (e.g. renaming the folder? Moving the folder to an archive folder?)

I no longer want to be polluted by obsolete projects in my search.

Thank you in advance for your help.