[panoramas4good]

You're right, there will absolutely be teams, typically governments, where this will rule them out straight away. Same goes for very sensitive info.

However, there is a large market of intel sharing done via file sharing. As more businesses are mandated to share intel, they turn to GDocs, Dropbox, email, etc to share the intel.

Coming from the security industry, app sec is top of my mind (though such promises are never usually enough to convince decision makers). All-in-all your point is a good one, and it's something I still need to fully validated (maybe there is demand for an on-prem version?).