Feature idea for the upcoming Forum channel: Subtags

Problem

Right now, on some platforms, when people create a forum channel they have the ability to add tags in their forum channel, allowing people a fast way of searching threads, however sometimes tags aren't enough and using too many tags can lead to an uncategorized mess (and people scrolling forever to search for a specific tag).

Proposed solution

I propose Subtags. What I mean is basically a way for tags to be categorized. People can have normal tags (the ones that most forum platform implements) and tags that can have more tags inside of them. For example a forum channel for software releases can benefit from Subtags like this:

Without Subtags: Supports: Windows, Supports: MacOS, Supports: Linux, Type: Utility, Type: Fun (5 tags in total) With Subtags: Supports: [Windows, MacOS, Linux], Type: [Utility, Fun] (Only 2 tags where the first one has 3 Subtags and the second one has 2 Subtags)

Subtags will help community owners to categorize tags for easier access and less uncategorized mess.

Notes (optional)

While searching for existing discussions on this topic I found this which mentions:

Supporting multi-tagging

But it's not clear by me what multi-tagging means in that context... I hope this isn't a duplicate