We could have been using SSH key logins for decades at this point but no we had to go and use usernames and passwords everywhere. I don't want a key limited to

We could have been using SSH key logins for decades at this point but no we had to go and use usernames and passwords everywhere. I don't want a key limited to a single device I just want a strong key that can automatically login to a website. The technology has existed for longer than the internet it just needs to become the norm.