Vault 3.0.0 alpha 5 is "theoretically" fully functional right now: it can sync, stake, send, receive, etc... Unless we find more issues, it is very close to indeed being the base 3.0.0 that will replace Vault 2.4.4; however it's still an alpha - meaning it's still at testing stage, until further notice.

In the meantime, we are working on the BPN functions to be added to Vault 3.0.0, along with a few interface tweaks and this will be the final Vault 3.0.0