Lightning Auth, as used here on Stacker News, is an absolute game changer.

The merging of password manager / payment rails is a deeply important shift in the way we engage with the web that people do not fully comprehend yet.

There are so many payment opportunities where I would be reluctant to "reach for my credit card" but I would have no issue using lightning for. Similarly, remembering passwords and logging into sites is still a pain in the ass sometimes, if I can just scan a QR to get in no matter what that is amazing.

I see social networks, email, and all sorts of other web systems evolving to use this system where your "digital identity" is no longer tied to email as the foreign key (the thing that uniquely identifies you) + payment method, but to your wallet's private keys handling both identity AND payment method.