I want a single set of shared folders across the whole company which I can invite users to under specific permissions.
I want a single set of folders relevant to my organisation which I can allow existing or new users to access. As people come in and out of my company I want to be able to fine-grained permissions to people about what they can/cant do with the folders and content.
I DONT want content to be assigned to specific people so that when they leave their content is obliterated. I want content to be assigned and shared to the company, not individuals who may be transient.
That sounds like a use case for SharePoint