Being able to use a standard U2F-compliant token means a much simpler setup to get things working. There is no need to setup anything on the key itself, beyond

Being able to use a standard U2F-compliant token means a much simpler setup to get things working. There is no need to setup anything on the key itself, beyond the standard new key registration procedure. Existing U2F keys used to authenticate with web services (WebAuthn) can be reused. U2F security keys are cheaper too.