At what point would Vim appear when using a gui client for git?

the github client is actually extremely artist friendly.

Not much commercial game development goes on on github, which IIRC is the only way to use the github client. (Where I work we have a local gitlab.)

Since commercial developers on github presumably use private repositories, how would you tell?

You can use the github client with non-github repos as well.

But not particularly stable. At least when I tried to use it about a year ago

As is sourcetree, and not tied to github