tl;dr;

- GitHub now requires 2FA

- Author reaction "Greaaaaaat, Microsoft wants to harvest more phone numbers."

- Author has a love/hate relationship with GitHub since 2012

- Author decides to not use GitHub anymore

I am not following the thinking process. And you can use a 2FA app, without giving your phone number to GH.

I can understand the stream of changes at GitHub does not resonates with the author opinions, but the "Microsoft wants phone numbers" is wrong I think.