Likely I am too old, but I completely don't get the idea of using an external service for authentication. Cynically, I have started to suspect that implementing

Likely I am too old, but I completely don't get the idea of using an external service for authentication. Cynically, I have started to suspect that implementing basic mechanisms such as authentication is a lost art among programmers with short attention spans raised on social media and Skibidi Toilet. More charitably, is could be an issue of switching to a new technology every three years, so best practices for implementing this stuff don't have time to be developed.