Sub Categories / categories within categories / nested categories

I'm fairly new to Discord, but I already see the benefit to being able to have categories within categories (aka nested or sub categories). Even if only 1 level deep. I have seen numerous posts from up to 6 years ago with hundreds of upvotes. It seems like a very obvious feature to add that the community wants and I'm hoping a newer post (haven't seen anything newer than two years ago asking for it) will help encourage the devs to implement it. 

Category:

 - Channel

-- Sub Category:

- - - Channel 

etc.