Advantages using folders is don’t use folders as folders.
It means use folder as a page and just this page can’t take notes in it.
It means use folder as a outliner .
I use root folder as page, and then use page as processes. not for classification. but use 2nd nested , 3rd nested “pages” …50 nested pages carefully for classfication
like this:
- folder as page
- page 1
- page 1.1
- page 2
- page 3
- page 1
It’s really simple ,no waste of time to think more on it
just change the concept : “folder as page” , without doing anyting else, keep folder as page to normal concept. Take it, keep it. Okay done, it’s good enough.
And most important thing is that Don’t Dont’t Don’t use the folder icon. (This way let obsidian looks like Evernote 
) , Don’t do that.
BTW, if you really want or need ,must have folder icon, I also repect with you.