2FA is a nice idea, but that means I can't use mobile devices to log into the same website that I use on my desktop/laptop. It also means I can't easily share

2FA is a nice idea, but that means I can't use mobile devices to log into the same website that I use on my desktop/laptop. It also means I can't easily share account information with my wife, or with my co-workers. Tools like 1Password solve those problems, but then we are back to the issue of not having real 2FA, because they're just passwords even if the are protected by a password manager. Moreover, those only address web site passwords. Those 2FA solutions don't do anything to protect any other accounts, like e-mail accounts or other local user agents.