Those 90% are wrong and so are the however many percent that have "My Library" folders.  Studio has never needed these, they are not like Poser's Runtime folder that is needed by Poser and Studio for Poser content.  By adding them you just increase the likelihood of the end user creating nested content folders and then wondering why they can't find their newly installed product.  And don't point to DAZ's new zip files having a "Content" folder, they where made to work in DIM which doesn't extract the "Content" folder only what is in it.  I suspect the "Content" folder was added to simplify coding DIM so it has a clear distinction between instructions and content.