> Well, no, it isn't. Clearly you don't do old people tech support.
Actually, I do — in fact the largest system I work on supports predominantly older people with disabilities. I would strongly suggest that you consider whether your assessment of the relative difficulty levels is skewed familiarity with the existing problems with password systems.
> No email identifier or thing to remember. How can I know log on at my other device?
> With a QR code? What on earth is that?
You still use your email address. This replaces passwords, not SSO, and QR codes are only used in some cases for some implementations where you might have restrictions on things like network connectivity. Try the demo here:
https://www.passkeys.io
Here's the signup process:
1. Enter your email address
2. Select the option to use a token
3. Approve your device's prompt (on iOS, this is a system dialog which explains that it's stored on all of your devices using iCloud Keychain and the site owner doesn't get any of your PII)
Note what's not there: picking a secure password, setting up MFA, remembering that password, and entering it reliably every time. You also can't get phished, which seems like something a lot of people would like.
We're familiar with the friction around passwords but consider how many hours a day humanity spends creating passwords, resetting them, dealing with typos, etc. If you support older people or especially those with disabilities, that process is a lot harder. For example, entering a password over a screen reader which meets most site's complexity requirements is terrible. Most non-WebAuthn forms of MFA are pretty painful that way, too, because it requires someone to switch apps, copy/paste or remember a code, switch back, etc. before it times out.
This won't be perfect on day one, I'm sure, but it's already easier and faster to use and that's only going to continue because now the system can be improved by the browser vendor rather than needing every site to agree on improvements.