I've been using TB for over 15 years now, and in that whole time Local Folders has been 100% useless for me. Just visual clutter. I even created an addon to hide it permanently, which got fairly popular and existed until they changed the plugin architecture a few years back. Once the addon broke, someone else created a working alternative almost immediately.

I understand why Local Folders exists, but never once in 15 years have I actually used it. It's about time they created a native option to hide it, and that's coming from an old fogy!