Totally. You wanna talk about people forgetting? It seems everyone has totally forgotten (or forgiven) that Dropbox was mentioned specifically in the Snowden leaks as a source.
Alternatives, though? Plenty: Google Drive, Box, OneDrive, iCloud Backup and iCloud Drive.. the list goes on with a simple Google search for "online storage"
Install the desktop application: https://support.google.com/drive/answer/2374987 Change sync settings: https://support.google.com/drive/answer/2375083
No native linux support is a bummer, but if you only need to use it there infrequently, the web client is quite capable for manual uploads and downloads.
For more similar alternatives, running owncloud on a VM is straightforward. And, of course the featureset is limited compared to Dropbox.