It is a darn shame, if the major OS providers didn't roll their own cloud storage, Dropbox could have been the default go-to across the board, and any other competitors that would have risen.
I remember even Ubuntu had their own storage offering, which had they kept it going, I might have subscribed to to this day. Shame, would have been an easy way for Ubuntu to fund itself.
Then they crippled the free plan and Apple and MS started pushing their services hard. And Dropbox seemed less ubiquitous after that.