Well, it looks like they state three options:

• Passkeys. This won't work over a medium term, period. It's tantamount to saying that SSH keys prove someone is human. If there's enough interest, they'll just make a software passkey solution that can work. Passkey being "human interactive" is purely a client-side construct.

• Biometric services. Strictly speaking, not an ID but it's not hard to imagine leveraging capturing biometrics to an ID like scenario.

• Government IDs. Well that's self explanatory.

They do state distancing themselves from the ID by trusting a third party service, but 3rd party ID service is still a thing.

Of course, this seems to be only after someone accuses you of being a bot and Reddit bothering to pay attention. Which may be almost no one.