Perceived security of magic link/passwordless login

As far as I've read, passwordless login like Slack uses (user inputs their email and then clicks on the login link in their email) is becoming more common and is just as secure as logins that require a password.

I am a designer at a financial technology company whose users skew older. Perhaps this type of login will feel unfamiliar to them (and thus untrustworthy) or too easy, like some secure step is missing. Has any research been done on the perceived security of this flow?