The Keybase filesystem docs still contain the text:
"At the time of this document, there are very few people using this system. We're just getting started testing. Note that we could, hypothetically, lose your data at any time. Or push a bug that makes you throw away your private keys. Ugh, burn."
And considering that kbfs is one of the more mature parts of Keybase, it has never inspired confidence in me that any of it is really ready for serious use.
"At the time of this document, there are very few people using this system. We're just getting started testing. Note that we could, hypothetically, lose your data at any time. Or push a bug that makes you throw away your private keys. Ugh, burn."
And considering that kbfs is one of the more mature parts of Keybase, it has never inspired confidence in me that any of it is really ready for serious use.