Learning how to password effectively is something that comes up in B2B in many non trivial software.
Magic link is effectively passwordless login, behind a facade outsourced to a third party provider.
Passwords are much more actual consent, than clicking on a link in an email account that might be open on a screen or device... not always.
SSO is technically easier than poor man's sso, it's just one click once logged in. Magic links make me switch a screen to make it easier for the developers of Magic Link to not implement SSO.
Fingerprints are a username, not a username+password. It's super convenient, but well established not secure.
Face-ID logins are more a username, should not be a username+password - selling it as secure is not ideal, but it is super convenient.
SMS verifications too, are a little weak, since SMS' generally are like post cards. But they are very convenient. Until someone does something to get malware into your phone, or your phone number itself which seems to happen so often.
Now, magic links are very convenient. And definitely can remove friction to you know, get a user onboarding to the point of adoption.