I think SM is on the right track.
SM should mainly be a mail server, as an alternative to Exchange.
It is certainly not the future to rely on Outlook, so the right way is to look for alternatives such as emClient.
The SM File Storage is certainly a nice to have, but not comparable to the real Sharepoint/Onedrive alternatives. It certainly never will be, as the development is enormous.
Like e.g.
- own app for iOS/Android incl. scan app
- own desktop application for WIN/MAC/Linux
- Locking files on/offline to reduce overlapping when editing
- Offline availability on end devices
- Extended sharing authorizations (guests, user groups, etc.)
- Browser extension for fast upload/donwload
- Own document viewer with extended document protection (save, print, allow/prohibit editing)
- Digitally sign documents
- Direct integration of MS Teams
- Direct integration of MS 365 or OnlyOffice for file editing
- and much more
By integrating such extensions via the providers' API, SM becomes a well-rounded solution and a real alternative to MS 365 and even better!