I love the principle, but I can't use it with AWS, I can't use it with my bank, I can't use it with my domain registrar, and I can't use it with Office 365.
That's 0/4 of the high priority targets for me.
Edit: If anyone from AWS is around, please consider this. Your organisation has made huge headway in the field of security, but the AWS console logon is a very high profile target.
I love the principle, but I can't use it with AWS, I can't use it with my bank, I can't use it with my domain registrar, and I can't use it with Office 365. That's 0/4 of the high priority targets for me.
Edit: If anyone from AWS is around, please consider this. Your organisation has made huge headway in the field of security, but the AWS console logon is a very high profile target.