I think that's a bad example to hold up, there's a repeatable issue with 123-reg's basic auth system that stops you from being able to fully log out on certain platforms.
Basic auth has no logout feature as far as I understand it. 123-reg tries to hack on something which looks like a logout feature but isn't.
For the point I was trying to make, it was the perfect example. It demonstrates that you can use basic auth, have "working" authentication, and be a successful website.
Note, the comment I was replying to was that basic auth is "unusable". 123-reg clearly disproves this.
And I cannot dispute any of your points, but the inability of basic auth to provide logout is certainly a concern that must be factored in to any decision making process. I personally love using basic auth in projects when I can as it just works for the majority of single user requirements.
