As an aside, I always wondered why GitHub had a web interface. Admittedly I’m a pre-web SCCS/RCS “old timer” but I wouldn't have put a web interface on it at all.

Managing just about any complex service is far easier in a GUI.

It's targeted from the beginning to the masses.

It's used for non-technical people too; for documentation, dashboards, and bug tracking.

Viewing all this data is far easier in a GUI than a TUI.