Unified file system


I know that there is a possibility to include external storages, such as Google Drive, Microsoft One Drive and so on. But during my tests I figured out that the external storage is always linked to one user defined folder. Are there any plans/ideas to get someting like an unified file system? As I understand the idea of an unified file system, the user has only one interface to deal with the storage. This is the missing feature - the software itself has to deal with the different kind of storages, such as local storage or a remote storage like Google Drive or something like that. I’ve heard about GlusterFS and think this is might be a good feature for Nextcloud.

Have you ever thought about such kind of feature?