there are some obvious discouragements, as outlined by grrowl in another comment, but I agree with you that it would be nice. Security and convenience have a we

there are some obvious discouragements, as outlined by grrowl in another comment, but I agree with you that it would be nice. Security and convenience have a well known relationship. I've thought it would be nice to consolidate 2-factor authentication methods in a single service, then require a single, 2nd factor authenticator for access to the service or vault. So a yubi-key like authenticator with your lastpass that then authenticates using 2-factor protocols of some sort automatically; again, trading security for convenience, but would also allow for things like auto-changing of all passwords (which happening more often couldn't hurt security) while still under protection of a 2-factor authentication.