Their roadmap doesn't exist beyond their one-hit-wonder. CEOs are stepping down because there is no future for the company unless you count acquisition by Amazon or Google or Apple, which will result in the entire company being walked to the grave.

This is really a non-answer. If your point is "Dropbox is a struggling company and therefore all criticism of it ever is fully validated no matter the timeline" then any criticism of any company ever will be validated eventually which is absurd.