Hi there! Tilly from HubSpot’s product team here 
Dropping a note to say we see this idea, and while it’s not in planning at this time, we are hoping to learn more about how you all are using categories today to inform future development such as this idea! We are working on some concepts for creating and managing categories and wanted to see if anyone on this thread is interested in talking more with us and giving an opinion. If that sounds like you, feel free to send me a direct message and I’ll follow up with next steps. Have a wonderful weekend!