It's clear that Evernote never implemented a hierarchy for the Notebook element.
The only element with a hierarchy is the Tag element (Mac/Win/Web)
I don't know about "blacklisting", but these are the basic building blocks of the Evernote database structure.
I'm able to work with these elements, regardless of the names.
Other users find this impossible; no real reason, they simply don't like xxxxxx. These people should think about using a different product that delivers what they like.
With over 200 million users, Evernote is not impacted by this negativity.
>>I don't like tags,
You don't have to "like" tags; and you don't have to use them.
I see the benefits offered by the tag feature, and make use of them.
>>...I like stacks, give the customers what they want...
Evernote implemented Stacks after customers needed a method to organize Notebooks
It looks like this will be replaced with the new Spaces feature.