[viraptor]

You can enable all email notifications and respond to them without visiting the site. If you like to work like that, you still can.

[sixstringtheory]

The site is the thing that sends those email notifications, and receives your responses to them. So if GitHub is down, that won't work.

GP is talking about directly emailing patches around or just having discussions over email. Not intermediated through GitHub.

[viraptor]

Yes, but this solves one part of the problem - accessible archive. Then you can revert to emailing people directly while the system is down.