>People at companies like Apple have gone to such great lengths to hide the complexity--and limit the ways of composition--of software

They also do it in confusing, inconsistent, and self-serving ways. What does it mean to "save data" like an image or a document? In Google Photos, it means you associate a copy of it with your Google account. In MS Office by default, it means you stick it in OneDrive.

Everyone wants the "happy path" of data storage and retrieval to lead directly to their own proprietary systems with their own proprietary implementations of basic file-like operations. No one wants the default to be the tried-and-true method of local files and folders.