Hierarchy Folders feature is under consideration at Unity

[SolidAlloy]

Just wanted to share with you and others who use the package that Unity considers adding hierarchy folders as a built-in feature. You can tell Unity why it is important for your case and probably raise the priority of the feature here: https://portal.productboard.com/ca1chnbwvzw1eg5yjc5rijnj/c/392-hierarchy-folders