Comment by bpt3

You need to make people include some sort of objective evidence with their argument, and either have a (hopefully benevolent) dictator solve the "vim vs. emacs" problems or just let people pick their environment and sort out any issues they create themselves.

If you're trying to pick a development language by committee, something is already very wrong. That something would be a people problem I suppose (because everything is), but it's really a strategic problem of the business.