IIUC, Keybase does not cache files locally (in contrast to Dropbox), so doesn't that mean that you can't access your Org files offline? Also, how does it handle latency, broken connections, etc? If the Keybase fs returns from a write call, is the file actually saved to anything? What if I save a 5 MB file over a slow connection--does e.g. Emacs block waiting for fsync?

The apparent lack of info about this (short of reading the source myself), and it still being in "beta" makes me very reluctant to trust it with my important data.